Cessna 150 Oil Change Tips

[@SmittySmithsonite]

Filling the oil filter is something my grandfather taught me - a life-long mechanic / jack-of-all-trades. I followed in his footsteps. Worked on my own things my whole life, and went to motorcycle repair school (MMI) in Phoenix 21 years ago. Been doing nothing but turning wrenches on everything from weedwhackers to trucks for the past 11 years. None of my cars, trucks, motorcycles, dirt bikes / ATVs, or paramotor ever see a shop other than my own, except for body work, windshields, or front end alignments. I've seen the proof that priming the filter is a GOOD thing. I used to have a hot-rod Cutlass when I was in my 20's, and you could hear the lower end rap until oil pressure built up, if I installed the filter dry. I did it one time just for my own curiosity, since I had been doing what dad and grandpa taught me for years without questioning why. Oil pressure gauge stayed at zero for several seconds after startup, too. Adding oil to the filter cut that time by 2/3rds. Also, we own a '86 Mercury Grand Marquis (17 years this year) with 268k miles on it. Every spring when I fire it up after sitting all winter, she'll run dry for several seconds. Sounds awful! Had I been less lazy, I'd have pulled the distributor every season and primed the oil pump before attempting that first start. Would probably get 750k miles out of that engine! If you've ever seen what happens to crank and con-rod bearings when they're starved of oil, you will fill the oil filter on EVERYTHING you own, as I have for the past 35+ years. I fill it right to the top, even if it's a horizontally mounted filter. Spilled oil is cheaper than a rebuild, no matter what it's powering. 😉 Nice work, Jim! If you think your clothes are bad, you should see my GOOD clothes! 😂

[@quinnjim]

Wow! Great information. No wonder the guy recommended that I fill the filter. Thanks for the information.

[@SmittySmithsonite]

quinnjim - You’re welcome, Jim. You’d be amazed at how much a few seconds without oil pressure has a cumulative effect over time. Best to limit that whenever you can. 👍🍻

[@athena1976]

Excellent video! Not an airplane owner myself yet. Possibly in a few more years when my oldest son goes off to college. I worked on A4 Skyhawks, and F14 ejection seats in the Navy. Great video! Keep up the good flying!

[@StevePickrell1978]

Interesting video. Hey I really like that idea of cutting the top off of the oil bottle to stick under the oil filter. I am going to have to do that when I change the oil on my John Deere Tractor LOL

[@lis819]

Thanks for that - just coming up for my first oil change and watching this helps heaps :)

[@quinnjim]

I did find out that some Tempest oil filters don't require you to add a film of oil to the rubber gasket. Might want to check the instructions on that!

[@grantlarmstrong]

Thanks for taking the time to video this. It was helpful.

[@Sstantial]

25+ year A&P here, your attention to detail as an owner/operator is good to see. Just to protect yourself you should make a disclaimer that your video is in no way to be used as a "how to video" and that viewers should always use their current AMM. It's also good to note that just because the FAR's allow owner/operators to do certain maintenance on their aircraft, it doesn't mean they "should be" performing it themselves. I see nothing wrong with what your doing, I just wanted to put that out there as a general comment. Now, tips I can add that may help someone -- When I take safety wire out of the can, I hold both ends and give it a twist to straighten or run it through my fingers to straighten before inserting in the hole in the base. Next, while the filter is still off, I take the old wire, get a basic measurement onto the new wire, place the twisters, and put the basic length of twist on making sure it is not too long. Then install filter, apply the proper torque, then you will find that a few hand twists will get you to that perfect length to fit the filter lug. Use the pliers to give it just a half or a whole extra turn from the end, and it will look perfect as far as twists per inch. After the wire is through and brought back together, put the pliers on and grab the wire. Give the wire a tug and pull some pressure on it before twisting. The braid up to the filter should be tight. Give it a tug with the pliers before twisting. When you finish your second twist, give the pliers a half twist by hand in a big "C" motion taking the pliers out and around (hard to explain in words) this will really tighten the whole outside braid without over twisting the wire. Maybe a mechanic can show you - it is a very common trick that is pretty much "tribal knowledge" in the trade and works well. I see looseness in the final safety wire from the base to the filter. That should be very snug if not tight otherwise the filter can turn just a bit before the wire would stop it. It's not horrible, just it could be better - that's all. I like how you take the extra step afterwards to go look at everything that was touched. This is also a good time to look for general cleanliness, and don't be afraid to touch, push, pull, and check the security of everything on the engine. Don't be shy! That's how we find loose hardware, or stuff out of place. Look for wires chaffing or parts rubbing that shouldn't be. Lastly, it's good to note that when cutting open the filter, seeing a fair amount of carbon is normal. You mainly want to be sure it isn't metallic in nature. Run a clean strong magnet over the filter media to see if anything leaves the filter and sticks to the magnet. There are plenty of non-ferrous metals that won't stick to the magnet but that is at least a good quick check. Great job overall and thanks for sharing this!!! Safe flying...

[@quinnjim]

Great advise. I'm still learning how to get the safety wire right. Thanks for all the good tips!

[@jbroheretoday]

This is a truly pleasant and informative video. Thanks for posting it. I learned from it.

[@063317Art]

FYI McFarland has a replacement fuel vent tube that prevents fuel from dripping out and you can top off your tanks

[@EchoKilo]

Could you use a filter magnet on the oil filter, to trap any metal?

[@quinnjim]

In aviation, everything is regulated very tightly. You might be able to do that on an experimental plane, but the certified airplanes might not allow it. I'm not really sure. I have your KZbin name laser etched on one of my 1911's.

[@davidturner6509]

Either hold the oil bottle flat or with the opening towards the top when you're poring oil in the filter and it will come out smooth.

[@Estebanserrano96]

Great information. Thanks. I'm researching to compare costs between purchasing my own Cessna 150 or renting one for flying lessons. Hangers are hard to come by and can be expensive.

[@gregmeadors9624]

Very cool. What a nice person! I used to change the oil on my Grumman Cheetah and it was always satisfying!

[@quinnjim]

It's a great feeling to have that fresh oil moving through the engine for sure.

[@gregmeadors9624]

Indeed! Even though oil is not inexpensive it is certainly cheaper than a premature overhaul!

[@Wemissubooey]

👍👍👍👍totally and absolutely enjoyed this video..all the details 👍👍👍been changing my own oil in autos all my life..never saw an airplane oil change procedure..might do a couple of things differently..probably use motorkote in the engine (excellent friction fighter that has proven itself through the time test of over a billion miles in the trucking industry and autos)..and I would probably have a 1000 point safety check list to go through with an airplane..often..cars don't fly..if something goes wrong you can pull off the side of the road..not in an airplane..ok now you've seen how uptight and weird I can be 😂😂🤣🤣👍👍maybe I would level out some and calm down a little if I ever started flying..anyway completely enjoyed this video..keep doing these please 👍👍👍👍

[@quinnjim]

Thanks very much! We change the oil every 25 hours or so. The oil additive I used is supposed to be excellent. There are only 3 things you deal with when doing the oil change on this type of airplane (drain plug, filter and filler opening), so a 1,000 point safety check would be difficult! :) You make a good point that an oil problem in an airplane can be much more serious than in a car. You can't just pull over and take a look.

[@Wemissubooey]

I didn't mean to sound like I was telling you to use motorkote..what you use sounds excellent and if it does the job..absoulutly keep using what you use..and the 1000 point safety check list..I'm just one of those people..I always check and recheck myself..did I forget or miss something..too uptight..maybe I need to take it down a few notches 🤔🤔🤔😂😂😂 but up in an airplane 😬😲😵😂😂😂 not good to have that type of personality and be a pilot..right? 😲😬😊😊..but I do very much enjoy the information and education I see in your videos..again thank you much 👍👍👍

[@BumbleBee55R]

@@quinnjim Great video. The Aeroshell 15W50 already has an additive for Anti-wear and Corrosion preventative. Although not Camguard, I am told that it is pretty similar. I have always run Camguard with my Aeroshell 15W50, however at my next oil change I am considering not using it as the Aeroshell already has an additive in their formula. PS: Motorkote is not approved for aviation engines.

[@Wemissubooey]

Ah ok Christopher..you told me more info I didn't know..there are so many places motorkote can be used..all gas engines..4 cycle and 2 cycle..firearms..almost anything you can think of..I did not know it was not able to be used in aviation purposes..one more piece of information I learned 2da..thanks 👍👍👍

[@terryard5095]

Ya, I'm weird like that, too - pouring new oil in always feels good! And the engine always seems to run smoother and stronger.

[@YamahaC7SRG]

Thanks for sharing! I have an oil change coming up on my C-150J. Does oil leak from the new filter as you install it?

[@quinnjim]

Nope. I make sure the filter soaks it up first. I learned that some oil filters don’t require you to put a film of oil on the gasket. You want to check for the directions on the box the filter comes in.

[@YamahaC7SRG]

@@quinnjim Will do! My quick drain oil plug is starting to leak and I'm going to get a new one. Do you have any opinion on which one to get? Again, many thanks for the tips!

[@quinnjim]

@@YamahaC7SRG I have never bought a quick drain, so I don't know much about them. Sorry!

[@ghueser]

Just a couple of comments. Camguard is the real deal and nothing like Marvel Mystery Oil. It was extensively tested by the FAA and does a great job. Also, the new Spin EZ filters do not require you to put oil around the seal prior to installing the filter. I was skeptical at first but it does work as advertised. I haven't had any leaks through multiple oil changes and the filter is easy to remove. Probably doesn't hurt to use oil on the seal if you want. You should be good to go either way. Good idea on using the cut open oil container, wish I could use one but my access is harder so am using a "form a funnel". Quick disconnect is on my oil pan as well. It is the only way to go.....and never leaks.

[@quinnjim]

I found out after the video that you don't put oil on the seal. It says so right on the box. I had never heard of anything like that before! I've been changing oil for almost 40 years. I think Camguard definitely helps. I've also heard that Avblend does a good job.

[@paulki8fr]

I run the can guard in mine. The previous owner of my plane used it too. I hit a deer and my engine had to be torn down and had to have a inspection. The cam was as good as new. Can gard works.

[@quinnjim]

That's good to hear! I'll keep using it.

[@RCAFpolarexpress]

Very Nice Tips ( screws, visual inspection, cut plastic oil paint and many more 👍👌🧐) I Just Bought a 150L 1972 C-FFAZ and Shell make the best oil 😇👌👍Cheers 🍻🍻

[@quinnjim]

Glad to hear you liked it!

[@donymaldo3698]

4:35 what size is?

[@quinnjim]

1”.

[@danielyasko9864]

I,ve been trying out 7 quarts . The dip stick goes up to number 6 , but the oil passes it by one more. It seems to be going good. O-200 A . 1977.

[@quinnjim]

You will destroy your engine doing that. It will be "going good" until it fails prematurely.

[@danielyasko9864]

Ok thank.My mechanic did that.In the POH it says do not opperate under 4 and max is 6. I was thinking,over the 6 would be saffer than under 4.

[@quinnjim]

@@danielyasko9864 If you put 6 in, the excess will dump out of the breather tube and end up on the belly. These engines like 4 quarts. Anything more is just a waste. They will stay at 4 quarts for awhile (usually). Over servicing the oil can do damage to the engine. No good mechanic would ever recommend that.

[@NEW_N18155]

What's it at when you land after two hours of flight?? 7 is way over full on an o-200

[@danielyasko9864]

@@NEW_N18155 That was 2years ago.When he did the oil change last year, he filled to the 6 mark. Everything is cool.Thanks for the concern.

[@inquisitive980]

Now for my serious comment. The twisted wire safety on the filter is a great idea! The quick disconnect on the drain sure makes it easy to drain. I had a “discussion” with an A & P about this. If there is a safety on the filter, how about something for the auto drain. I think the engineers did a half good job. A safety would have made it perfect. Just as an aside I am not a mechanic I am a PE.

[@quinnjim]

I'm hoping the pressure keeps the quick oil drain seated properly. It does seem a little weird that you can make the oil come out so easily.

[@inquisitive980]

Not sure if you know of Nancy Bradshaw. She is paralleling you in Texas and Florida. Regional Pilot and CFI. Prior to becoming a pilot she got her MS in aviation engineering. She is “off tube” this month, but it would be interesting to hear her take on this.

[@quinnjim]

@@inquisitive980 I'll check her out.

[@billyhbarkley9530]

Another great video. Lot of good tips. Is Texas still on your 5 year plan list.?? Bill

[@quinnjim]

Texas, Tennessee or maybe North Carolina. We still need to nail down a solid plan!

[@robfraley4210]

quinnjim, we lived in NC 3 different place over 27 years, looked at 10-a-See, but ended up moving to the Backwoods of N Floow’da up near Georgia 17 years ago.

[@SixStringflyboy]

Clean-looking M model you have there! Mine is a few serials older than yours, getting the spin-on oil mod in a month or so. I actually just crossed TBO (which on the O-200 is actually 1800 hours, not 2000 like the Lycoming O-235 in the 152). She's making good compressions on all 4 cylinders, though I did have to have #3 rebuilt at annual this year for a worn exhaust valve. Still breaking it in, which is why the oil change is coming up in about a month. . Most importantly, the engine isn't making metal. A&P/IA looked at what he could see of the cam with a borescope while the cylinder was off, said it looked great. He and I have discussed in depth. He doesn't see any red flags currently, so I'm budgeting for an overhaul in about 4-5 years unless the engine tells me otherwise. Hope you've been flying the wings off her.

[@quinnjim]

I did a few oil analysis tests and the results came back great. I’ve got about 600 hours on this motor. I flew a Cessna 172 once that had 3,600 hours on the O-320. TBO is just a suggestion. I have had several friends in the last few years who overhauled their engines and had nothing but problems. I’d take an engine that has been running well for twenty years over a new overhaul nowadays. Continental quality has really fallen since the Chinese bought it.

[@rogershelton1312]

AeroShell 15w50 has already blended in their oil formula the anti wear/scuffing that meets the Lycoming LW 16702. Phillips oil does not. Users of Phillips oil would want to use CamGuard. The CamGuard is not really needed when using AeroShell oils.

[@quinnjim]

Good to know!

[@benderaviation]

Nice little 150. Working on planes is remarkably similar to cars. Fasteners are fasteners, after all. Just add safety wire.

[@quinnjim]

Yep. You just have to do a little documentation of EVERYTHING you do on an airplane to make it legal.

[@inquisitive980]

Well there is some good news and some bad news. The results of the oil sample came back. Turns out your 150 is due in four months! Congrats! Are you hoping for a high wing or a low wing.

[@jhaedtler]

You missed out on big round engine oil changes! You use quarts Round engines use Gallons. Normally 6 gallons on a 450 and 600 hp! Wire skinny thingy, I love technical talk! Did you get your at the aviation department at Harbor Freight? Thanks for the video!

[@quinnjim]

Love those round engines. My friend has a Cessna 195. I'm going to try and get a video of it for my channel. The guy in the hangar across from me has a T-6. He has owned it for over 50 years. In his 80's and still flies it every day.

[@jhaedtler]

@@quinnjim I was weened on AT-6's. My neighbour when I was a kid had a company that bought and sold 34 of them. He also gave me the opportunity to tear down my first aircraft engine. A Curtis OX-5 from a Waco 10, I was only 6! Thanks for the videos. I spent over 25 years working on crop dusters. I sure miss those long hard days!

[@jerryspringer6411]

What oil were you using on your changes? I keep seeing people using aeroshell 100+ or Phillips 20w-50

[@quinnjim]

Aero Shell 15-50.

[@NEW_N18155]

I use the Phillips 20w-50xc on my personal 150L I overhaul engines and I can tell what oil they have used since the last overhaul due to the wrist pics and how everything comes apart..

[@joeroscillo4015]

An awful lot of screws to remove and index their order, when by now, you'd think they could have made a convenient hatch for easy access to oil filter! Cool oil catcher and it probably would cost $100.00 if it was a custom part, from Cessna!! In all, it seems expensive for something needed every 25 hours! But, understand, more safe than sorry!! A job well done!!

[@quinnjim]

It would be nice to have better access to the oil filter. I can take the top cowling off in about 5 minutes, and it's a good opportunity to take a peek at the engine to make sure everything looks OK. Most of our flights are right around 1 hour, so we only need to change the oil a couple times per year (flying 50-60 hours per year is a lot for most people).

[@seajCharleston]

Good job! By accident or design, the "other pilot" was not there to assist and learn for this task? :-)

[@quinnjim]

Maddie is currently working 45 hours per week and taking a college Physics class. Busy girl! It's hard for her to find time to hang out at the airport right now. She may go up tonight and post a video on her channel.

[@seajCharleston]

@@quinnjim Had a feeling it might be something like that. Good for her! Y'all stay well and safe up there!

[@robfraley4210]

quinnjim, at LEAST She isn’t afraid to do, what is now to the under 40 somethings a “Four” letter word... ... “WORK”.... !! 😱😳🤭😣😩👎

[@irishcurse65]

I had to deal with safety wire everyday in the Air Force. Hated working with it. Spinny tool = Safety wire pliers

[@mikecoffee100]

Pointers are always good especially when You can save money

[@eonbio]

Looks like you have a Continental O-200. Cam Guard is MUCH more important in Lycomings which have the cam above the crank. The Lycoming cams loose oil coverage during storage, condense water, and rust.

[@jeromeervin5947]

Semi synthetics such 15w50 are not as good as removing sludge such as aeroshell w100 or phillips 20w50

[@NEW_N18155]

Love XC 20-50. Engine tear down I can tell a big difference

[@rexgialla1970]

Nice and professional job ! did you start to work again ?

[@quinnjim]

I'm sitting reserve. Haven't really flown professionally since the end of March. Still getting paid my base guarantee (thank goodness).

[@rexgialla1970]

@@quinnjim time to get back to work !! In europe we're re-starting aviation,..much less but It's start !

[@waukeshapilot6462]

So how much money do you think you saved??????

[@quinnjim]

I'm not sure. The oil is about $8.00 per quart and the filter is about $30.00. I ended up putting 5 quarts in so it cost me about $70.00 to do it myself. I would guess that a shop would charge me an hour or so. I probably saved $80. I like doing it myself because I let the oil drain out for a LONG time where a mechanic being paid by the hour might just let it drain for 2 minutes (leaving a lot of the worst sludge behind). I've had so many issues with people changing my oil in cars over the years, that I want to do it myself so it's done RIGHT. It's not just about saving money for me.

[@fliboyHacksaw]

I soloed in this Airplane in this Airplane 17 APR 77 still in High School John Mark Shaver Shelby NC. EHO C-150 owner

[@quinnjim]

It's a great trainer. This particular one taught a LOT of people how to fly. She lives in Texas now. I sold her and upgraded to a 182.

[@loves2build]

This was a good video.

[@darrenroberts3819]

The wire will break if twisted too much

[@drobertsone]

If you hand twist the wire, you will never over-twist the wire.

[@35whiskeygirl]

I have a question that’s not oil change related. My question is: can you report a CFI to FAA or the Department of Professional regulation for not implementing a student to following all safety pre-checks for plane. Example: not requiring a student to check the fuel tanks or reading the safety list? I’m having problems and need to know what I should do. It’s recently come to my attention. Thank you in advance if you could answer.

[@quinnjim]

I would just look for a new flight instructor if you don’t think he/she is doing a good job. I’m a big believer in checklists and checking the quality and quantity of fuel in a small plane before flying. It’s pretty unprofessional to teach students NOT to do it, but I would probably just have a talk with the owner of the operation. Maybe drive down to Lake in the Hills and check out Blue Skies. They are VERY professional.

[@35whiskeygirl]

quinnjim thank you. I feel like crying. I’m also angry he put my life in a possible jeopardy. I want to learn the right way. Ugh. Let alone the money I’m out. I will be speaking to someone on Monday. Wish u we’re teaching. Your daughter is a lucky girl.

[@quinnjim]

@@35whiskeygirl Thanks very much. I wish I was set up to flight instruct! Right now I can only help out friends and family since charging people involves a lot official “hoops” I’d need to jump through. The time you have logged isn’t a total waste. I’m sure you got something out of it (I hope!)

[@35whiskeygirl]

@@quinnjim I really enjoy your flying videos. I learn a lot from you and your daughter. I hope you will do a video on how to pre-flight check an airplane. I have learned a few things. I am going to produce a video on how to screen your next CFI! LOL. No worries, I've contacted the manager. It will be resolved on Thursday. Not sure if I will continue at my airport, but I will let them know, what's been happening. It's very sad. I feel very upset about the situation and I hope they will care more about safety and how they trained new student pilots. I so appreciate you answering my questions! Thank you!

[@John170B]

Just swap your CFI or flight school entirely, and if stuff like that makes you uneasy, come to the airlines it doesn’t get much better.

[@robfraley4210]

Looks just the same as mine 🤔 9:27 an INVICTA..??? ⌚️👍 Every one I know since way back just puts some “Marval Mistry Oil” in with it 11:50 the A&Ps all swear by it ✅😎

[@quinnjim]

Indeed an Invicta. I really like the watch. It started out losing 15 second per day. I would set it 1 minute fast and it would be constantly getting more accurate over the next 4 days! Lately it's losing 2 minutes per day, so I may have to adjust it.

[@robfraley4210]

quinnjim yes, I have had mine for over three years, actually that one an the silver & gold band with green face too, but it wouldn’t stay running over 24 hours after leaving it sit the way this type does, about 30+ hours actually. It would loose 5 min per week though, so I finally set it up faster in January, ever so slightly. With the jewelers hood spectacles and tools 🛠 I have from doing most all my watch work (like the airplanes) myself. But even with the slightest of almost Unnoticeable movement to the + side it now gains 5 min a week 😣😩👎 go figure.. always had much better luck on the airplanes ✈️ Hey, are those ECI cylinders.?? I found them to be the cheapest Good ones to use, replaced 3 of them over the years on my last plane, the 1972/73 C-150L 😎👍

[@jan3195]

Very informative video. I know you're looking for your next plane. After it is purchased, will you keep or sell the 150?

[@quinnjim]

Probably keep it. It's perfect for Maddie to build time and for Quinn to get his license in. We fly it around for $15.00 per hour in gas. The Cirrus was over $40.00 per hour. It adds up quickly when they need several hundred hours!

[@jan3195]

@@quinnjim That makes perfect sense to me. Good luck with your search.

[@jerryspringer6411]

@@quinnjim were you using mogas or was avgas $3/gal?

[@quinnjim]

@@jerryspringer6411 Gas at my airport was around $3.75 at the time. We could get it under 5 gallons per hour if we weren't in a hurry.

[@chrisberg4952]

There's nothing Like the Mighty Quinn.

[@darrenroberts3819]

Tempest oil filters do not get the seal lubed. This person did not read the installation instructions

[@NEW_N18155]

Different screw size?? That's why you have the A&P at annual change your freaking nut plates so there all matching. Leave the length of the safety wire on the end of the filter and cut at the housing so you can hang your filter into a bucket off the handle. Take a flipping corner (ie 90') of a big card board box ie 24" long and tie a long string with a big washer hanging down so the stream drops onto your drain pan.. Why not just use a dab of DC4 around the seal and boom done. We maintain a fleet of 700 flight school aircraft all over the country..

[@quinnjim]

I'm going to need you to calm down.😀

[@drobertsone]

Punch a hole in the side of the filter and use shop air to blow the oil out of the filter back into the engine.

[@quinnjim]

@@drobertsone I’d worry about metal from my punctured filter getting in the engine. Also, not sure if that dirty oil would have time to get to the drain plug

[@darrenroberts3819]

. I maintain a fleet of flight school aircraft. The procedure i stated is quick, there is no metal introduced (we do oil sampling each month), and the oil goes straight into the sump.​@quinnjim

[@darrenroberts3819]

​@@quinnjim. Use a small punch. The hole doesn't have to be large

[@christiancormier7847]

I’m weird like you! Nice video, thanks.

[@inquisitive980]

I have a problem. The oil filter has a safety wire to keep it from vibrating loose. Great safety idea. Now for the oil drain. A quick disconnect? Great for your garden hose but your aircraft? The professional engineer in me just said what??? Simply consider Murphys law. There was an A & P that did a similar video on a 150 and I was shocked when the quick disconnect was shown. I have tried to get an opinion from Nancy Bradshaw. She has your parallel job flying and instructing. She also has degrees in aeronautical engineering. She is not familiar with the 150 oil change so I have not been able to get her opinion. I do realize there is no history of problems with this method, however it only takes one to start. I am in no way directing my dissatisfaction with the engine designers to you! Just bringing up something I am very much against.

[@quinnjim]

I think the "quick drain" systems are pretty fool proof. Just about every plane I have owned has one. If you are not pushing up and turning them "on", they really don't leak. I guess it is just one more thing to go wrong though...

[@jamesnelson7415]

It is not a "quick disconnect," it is a quick drain. They have been available, and very popular, since at least the 1960s. They replace the drain plug, and are safety wired in place at installation. They are, essentially, a spring loaded (to the closed position) valve, typically with a cam type operation. They are very reliable, and really speed up oil changes, as well as eliminating much of the mess potential. I've owned many airplanes with them, never had a problem. The only reason to NOT have one is in the instance of possible airframe interference, such as a very close bowling or retractable nose gear, which could possibly force the v as live up and open.

Like 👍👍👍

[@wayneschenk5512]

Clean machine.

[@NEW_N18155]

Safety wire pliers

[@davidturner6509]

Ah, I see you did when you filled the engine.

[@facebook2k7]

Worst clothes? Looks similar to my good clothes.

[@jbroheretoday]

This is a truly pleasant and informative video. Thank you for posting it. I learned from it.

[@quinnjim]

That's great!