What makes the Cummins 6 cylinder better than a V-8

Go Cummins. This is why the 6 cylinder outlast the rest.
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[@silvioholley]

Bought my 2017 Dodge Ram 3500 6.7 Cummins with the Aison transmission brand new. After my warranty went out I deleted my truck. It has 320k miles and still going strong.

[@MarionBlair]

That's awesome

[@Ffmt-ri3ti]

Holy shit that’s a lot of miles. Do you hotshot it or something?

[@hardtruth2039]

I purchased my first and only diesel pickup when I retired in 2019. I looked at used and new and researched for a good year before settling on buying a brand new base model 2018 Ram tradesman crew cab Cummins with the fifth wheel package. I had all of the right upgrades done and had the trans upgraded and studded the motor at 9k miles. I could not be happier. Great fuel mileage and tons of torque. I always run the exhaust break, good for the turbo and love the sound. My def tank stays full.😉😉

[@cheeseymccheese7249]

Did you get the delete done to it? Its a totally different truck when that gets done

[@Rizzle21]

​@@cheeseymccheese7249def tank stays full

[@thisguyDrake]

As someone who knows a respectable amount about gas engines, and not much about diesel, I really appreciate hearing your general insight and wisdom. Some people are lucky enough hear it from family/friend, but because you made this video, I got to hear it too.

[@Biker758210]

I bought a used 2018 Ram tradesman mega-cab 6.7 Turbo Cummins 4x4 Short bed with the fifth wheel package. Love this truck Best Truck I ever owned. Thank you for the information, Mr. Marion Blair.

[@bbrcummins1984]

👍 , thats why Ford Boys are installing Cummins in their trucks, never seen a guy put a Ford motor in a dodge 🤔

[@countcuda70]

And what engine is it?? The 12v. It's because it's easy. Fuel and power and you're good to go. Don't see many common rails being put into anything

[@MrStaybrown]

Or an Allison 1000

[@sergiocampos1822]

Marion that was the best and quickest explanation I've ever heard describing diesel engines. Thanks for posting it. Your explanation made me feel better about buying my 2500 Ram.

[@brenteason9891]

Like those "Mr. Blair ride-a-longs". I noticed on the last few fishing trips to the outer banks of NC, we counted the number of Ram trucks with the Cummins (5.9L and 6.7L) and it was about 40% Ram at the boat ramp parking lot. The boats and trailers are bigger out there where half ton trucks would not always get the job done easily (this is not like the smaller lakes with smaller boats). You will see the occasional half ton truck hitched up to the 9-10k lbs boat, but that's when we stop what we are doing to watch for entertainment. :).

[@koas8478]

Your the man love your vids! Always great insight

[@hardtruth2039]

Great to see you brother! Excellent video as always.

[@tikkin11]

Couldn't agree more Mr. Blair, it's all about the Cummins.

[@xxlxpman]

Thanks Marion, I always enjoy your videos and appreciate you sharing your insight and knowledge. I hope all is well for you guys.

[@dennislautner8709]

I love your videos. Just took my 2022 2500 on a 200 mile tow, most of the time at 1500rpm. Absolutely a dream to drive, used all of you tips on towing. Thanks

[@BigBadJohnDiesel]

Any truck driver and diesel mechanic will tell you that an inline 6 is a true diesel design!!

[@securenc1]

As always.. great content and informative. Enjoyed this video sir.

[@TheYsanchez]

it is always nice to see you have a new video

[@THATNI99AJOHN]

The thing that scares me about ford is when something goes wrong you may have to take the cab off .

[@keithhansen3963]

As always, you're right on target. Thanks Marion

[@natedog01able]

The older trucks were v motors. The movie maximum overdrive had a truck with the green goblin face in the front. It had a v8 2 stroke diesel. I worked at werner enterprise and I was at the museum they have a v16 Detroit 2 superchargers and 4 turbos. I noticed the new motors can make more power from a stright 6 than a old v16 2 stroke

[@russellkvistad7976]

You said fewer valves - I don’t think so Marion. I recently learned that the Cummins 6.7 L has 4 valves per cylinder, same as the Coyote 5.0 Ford gasoline engine. What a concept! Love your videos, so keep up the good work!

[@leestanphill1]

#Truth In-line torque cannot be matched. The longer stroke makes everyone happier 😉

[@GaryBlankenship96b40]

Inline torque is the key

[@kurtdarrow1959]

Just recently found your channel. Like you, I researched the diesels before buying a new 2014 Ram 3500 ST. Love my truck and it now has 95,000 miles and has always brought us home. I pull a 11,000lb Reflection RV and live in Denver. During the travel seasons in Colorado and other Rocky mtn States, most of the driving is usually at higher altitude, usually 5000 ft and above. Diesels are the best at pulling in this state. However, as you go up in elevation air density starts to drop off and engine performance will follow suit. For all you Ram Diesel guys look at the Banks 50 state legal Monster Ram Intake Manifold. This manifold helps all of us High Altitude guys out by bringing in more air flow at over twice the stock manifold numbers. It removes the problem grid heater that chokes the air flow by over 50% and the dreaded bolt that can burn off and drop into cylinder 6. It is replaced with Banks own intake plate with a much larger opening and no restrictions. The intake Horn is also much larger as well and incorporates its own heater coil and all the stock EGR system hook ups. Just had it completed in my truck and what a difference. I can only imagine what it will do at lower Altitudes with higher air density. Thanks, Marion for all your information on the 6.7 Cummins. You have provided us all with a lot of great DYI information.

[@nugnug9447]

Thanks Marion!

[@kilowatt02]

I agree. Love the Cummins.

[@davidrayner9832]

Australian here. Australia is the land of the inline 6. When holden started production here in 1948, they made I6s only until around 1968. When Ford began making the Falcon here in 1960, it came with an I-6, not the 260 V8 the American version had. I could go on but most Holdens, Fords, and Chryslers sold here had I-6s. Back in around 1990, I wanted a Falcon from the early '80s and it had to be a V-8, not the 250 I-6. I bought one with a 302 Cleveland (I bet you didn't know there was such a thing), rebuilt it, and sold it a few years later. Around 10 years ago, I wanted a Ford Econoline (never sold here so had to search online and import one) and it had to be a V-8, not the 300 I-6. I bought an '88 model with a 460. Why did I want a V-8 both times? Purely for the sound they make. That's it, end of story. I know very well that an I-6 is better in every way than a V-8 but I just can't stand the sound they make and the worst of all are the Cummins diesels with those ridiculous gaint exhausts that some Ram owners fit. I couldn't stand to listen to that all day. If I ever own another I-6 it'd have to be muffled to the extent it sounds like a Tesla. I'm building a hot rod at the moment and for a while, I considered a Ford Barra (the ultimate I-6 engine) but for as good as they are, I decided I just couldn't live with the sound it'd make so I changed my mind to a Ford V-8. I was going with that until a friend of mine gave me an engine he had that he said he'd never use. It's two I-6s on a common crankshaft, from Coventry, England. If there's one design that's better than an I-6 it's a V-12. Twice as many moving parts but perfect primary and secondary balance and they sound great. As for room in the engine bay, mine is out in the open so not a problem. I've always had a thing for V-12s but I never thought I'd own one.

[@petereacmen716]

Wish they applied the KISS design method to the grid heater!

[@timholmes4396]

Marion, you are so correct especially about looking under the hood of both a Chevy and Ford diesel powered truck. That's one of the biggest reasons I bought my 2014 Ram with the "Kiss" engine under the hood! It's much simpler and easier for me to work on compared to other brands.

[@IBSC2000]

Good to see you sir

[@robertanthony312]

How about removing the cab in order to work on a Ford diesel?

[@mtrcitykid2836]

Great video

[@Max-kh9do]

Marion, I would also add that the I-6 has a cold side (intake) and a hot side (turbo, exhaust) - this makes the engine more efficient (intake stays colder). When you have a turbo in between the heads on a v8, it heats the intake air more, and makes it a pain to work on. When I worked diesel engines (now I do hydraulics) I was always impressed on cummins parts quality vs Detroit, international and others. Cat engines were quality too.

[@OutpostCTD]

I like the flat torque curve of a I6. Great video

[@MarionBlair]

Thanks, love your videos!

[@allenchitwood493]

Thank you! You solidified my decision on which engine is best. That leaves the Ram 2500 with the Allison 10 spd as my choice for a diesel truck. Adios, amigo!

[@Brandon68plus1]

The old XJ Jeep Cherokee had a great motor with the 4.0 I6

[@rodrigofabregas7756]

Thank you for this nice video!. I also think that the crankshaft design play an important role in the high engine torque, higher crankpin distance from main shaft journal for example...am I right?

[@MarionBlair]

Yes, absolutely

[@oscarbear7498]

I just got a jeep wrangler, 06 rubicon. It has a inline-6 4.0liter engine. It's my first inline 6 and the sound is amazing 👏, sound way better than a v6 and the torque is much better, only downside is it has less horsepower. Can still do 70mph and be under 2k rpm which is pretty cool as long as I keep stock wheels, and remove the back seat lol

[@mdsquared9704]

Awesome video. While I'm a giant fan of the duramax, Cummins is awesome too!

[@tonyboneize]

I’m a ram guy and have 2. A 2008 and a 2019. Put that damn Allison with it and keep the cp3 and you’ve got one amazing 🤩 truck.

[@marshalllapenta7656]

EXACTLY!!!

[@davemccage7918]

War stories with Tom Anderson!

[@OzarksWildman]

It’s mostly Superduty trucks in SW Missouri and the Q1 diesel sales reports show Ford at 45k, GM at 33k and Stellantis selling 29k Ram trucks.

[@andrewmusick6965]

I really enjoy your videos because you use data to develop your opinions. I have a 2017 Ram 2500 with 6.7 Cummins. What minor modifications do you recommend to improve fuel efficiency/performance?

[@MarionBlair]

No I seems from my test, it may be better for engine since it appears to run less soot through the engine.

[@detroitoneness6237]

One simply has to look at a 4.3 on an engine stand next to any diesel and see the enormous size. As far as half ton boys go the 4.3 is still magic, light as hell, ramps up quick, naturally aspirated, old school compression specs! Put it in a High Country Package to clear the snow. But for heavy Tow Cat made a 3208 maybe that was V-8 and solid to.

[@truetexan7755]

My 6.7 dually will pull my 18,000 lb fifth wheel up a small incline without throttle, just let off the breaks and it goes. My father had a straight 6 gasser ford , three speed manual on the column,,, wouldn't go that fast, but could pull anything as long as you put enough weight on the back tires to keep them from spinning out.

[@jeffarthur322]

You forgot Cast iron block ! The other guys keep changing their designs where as Cummins just keep refining theirs. I will say though the later Duramax’s are very quiet & smooth. I guess your turbo actuator is holding up ? Always enjoy your videos

[@countcuda70]

Duramax has been the same design since 2001

[@kshugart70]

The only complaint I’ve ever had with my 98.5 24 valve is the weight. The motor is fantastic but compared to the v8 trucks the front end is noticibly heavier but with the ride quality being 2 or 3 times better then same year ford and Chevy trucks I can’t complain

[@GMCJay_lly]

Look into Scania, they are VERY popular around the word for commercial use and in the V configuration. In-line is longer, v is more compact for packaging.

[@MarionBlair]

Yep

[@michaelgreen4838]

LIKE THIS GUY!!!

[@Humblescape]

In New England work fleets are about 80% Fords. When in comes to 5th wheel hauling/hot shot is definitely 90%+ Ram. GM work trucks are few and far between and even then mostly gassers.

[@Bananahammock88]

I’m wondering if a banks cold air intake will help improve my fuel mileage on my cummins

[@MarionBlair]

Although Banks has some good stuff, I'm not sure it's an improvement over the OEM cold air intake.

[@palharley]

I'm at 1 minute 50 seconds I bet your going to say what working truck do you see. Doing hotshot work working trucks, LOTS of Ram trucks. I've been telling my friends just look at the interstate and start counting. Let's see if I'm right and that's what this video is about.

[@palharley]

Just drove from OKC to Mobile Alabama and counted working trucks 4 to1 RAM over the other two

[@MrStaybrown]

I drive flagstaff az to Albuquerque nm and I see Ram hotshot trucks keeping pace or flying pass everyone, the Rams are always loaded heavy or large. Then next is the Duramaxs, they usually are going a bit faster than the Rams. Lastly the powerstrokes, everyone and I mean everyone passes them, I've seen a few by the road with the hood up. That hill before Albuquerque just after route 66 casino..I always see a powerstroke pulled over right before the top. Just my observation.

[@RANDOM24h]

Exhaust brake makes much sense on car that heavy... brakes live longer

[@nathanurick8320]

Mr Blair Sir when you change the transmission fluid on your ram do you do what they call quick learn afterwards.

[@dptp9lf]

i had a couple 3408 Cat's in my trucks back in the late 70's early 80's and wow total shit. Head gaskets and pistons I've not seen a good v8 diesel since either... including the powerstroke and duramax. I can't explain the metallurgy but they just can't maintain over time. The drivers that gravitate to the powerstroke and the duramax are the type that look at unloaded driveability which is snappier etc. more like a car.... that's not how truck engines work.

[@countcuda70]

That's a good joke. You're funny. This is the typical Cummins driver response. I can't explain it but.... Not taking anything away from the Cummins it's a great engine. I've had a few. Still own one. A built 97 12v. Also have a Duramax. They are also great engine. For a hd pickup all 3 engines are good. Way more power then anyone needs. We all just want more

[@markrich3271]

When you can make 1200hp on a stock bottom end have more towing power then you will ever be able to use and still get groceries I choose you. It's a great truck . I will never get rid of mine.

[@countcuda70]

Stock bottom end L5P Duramax will support 1000+ also

[@markrich3271]

@@countcuda70 Stock bottom end . I didn't know that . That's really cool. 1200 is the rods on a cummins with rods you'll get 1600 then you need pistons few hundred more you need a deck plate. They really are robust engines.

[@countcuda70]

@@markrich3271 This is a blanket statement. It's not true for all of them. 1000+ is dependent on the year and how the truck is set up

[@markrich3271]

@@countcuda70 all what ? cummins engines ? All cummins engines can handle 1200 plus and that's conservative. Stock bottom end. Every year . 89 to 2002 internals can make more.

[@countcuda70]

@@markrich3271 Yes and no. It depends on the setup. You can make the power up higher in the RPM to stay safe. You're not making that kind of horsepower and torque below 3000 rpm and staying safe with it

[@CToles-dg5pn]

So you are saying running def is superior than deleting regarding engine longevity? Also, when are you upgrading to a 5th gen ?

[@MarionBlair]

No, I'm not saying that at all. Not even close. Deleting is far better, ha.

[@gonzogriff]

packaging must be the main reason cummins sells a v8(thinking of the nissan titan). Doesn't seem to have any other benefit...

[@MarionBlair]

Yea, that's probably the reason.

[@alouisschafer7212]

Id rather have a truck that drinks DEF like nothing else but has zero EGR in return.

[@MarionBlair]

Me too

[@CaptainChris69]

Simpler is better? DUHH?

[@matthewkaake6593]

Because the 7.3 doesn’t fit in anything lmfao

[@countcuda70]

The 8 are not less efficient. The Cummins is the same displacement. They make power 2 different ways. The I6 doesn't make torque any lower then the V8s. If you go back and look. All 3 are usually within 100rpm of each other and change spots with model changes

[@catdaddy3728]

You want a diesel, you get a inline 6. Light duty to the big rigs... v8 , v6 diesels.... nah. Hat tip to Detroit Diesel... only V diesel worth a shit. Just for the sound if nothing else. 3408 Cat, 903 Cummins, compared to a 6 cylinder... heavy, low power to weight aspect and THEY SOUND LIKE SHIT. Sorry, just my opinion...

[@countcuda70]

Pretty sure the highest HP from a factory diesel is from a V8 both hd pickups and big rigs 😁

[@GaryBoyd02]

Going to disagree with you in this one Marion. Duramax guy since the 80s and they will do long haul truck mileage of 600 or 700 kms per days. 450 miles a day. Have seen them run up over 800,000 kms or 500000 miles all the time. No issues from 1983 until 2012. Lots of em! Torque develops early no turbo lag. Fuel mileage every bit as good too. These trucks ran 7 days a week. Only Christmas Day off all year.

[@echocall]

The Duramax came out in 2001

[@BigBadJohnDiesel]

@@echocall exactly!!

[@GaryBoyd02]

@@echocall Well I go back all the way to the 6.2.

[@bbrcummins1984]

Something smells fishy .

[@wizard_of_poz4413]

Idk we just had an awful time with the duramax

[@michaelpincavitch5245]

Inline 6 has more main main bearing because of only one connecting rods per journal . And the pistons run straight up and down which let's the cylinder wear better than a V8s because of the weight of the pistons being pulled down from gravity!