Oil viscosity fundamentals explained

[@LubricationExplained]

Looking for more structured lubrication courses? Join LE Pro for $30AUD per month (that's about 20USD). lubrication.expert/product/le-pro/

[@YoungMadeManBobo]

My name is Tadarow Bobo. I'm currently working at I'm sawmill. Starting as an operator now I'm in the process of completing the reliability lubrication field work here then ill be able to take the MLT 1, (your first certification requirements). Can you assist me with anything pertaining to the actual classroom bookworm material. Dm if needed. Thank you on this so far.

[@doctorwarpspeed8779]

I finally understand viscosity much clearer. "Thickness" is just cruel slang invented by some petro-prankster trying to confuse us all. Another great video! Thanks for taking the time for the lesson.

[@LubricationExplained]

Glad to help!

[@gavinfergusonmusic]

Thank you so much for this video. I'm in the automation industry and am now involved in blending oils. This has been very helpful

[@andrewbryan8597]

The educational content and simplicity of explaining basic and advanced lubrication concepts is top notch. Thanks for making these videos, they're helping me quite a bunch! I'm binge watching them 😬

[@LubricationExplained]

Glad we can help!

[@fr3ddyfr3sh]

So happy to live in 2021. The videos are priceless.

[@LubricationExplained]

Thanks! Glad you're enjoying them.

[@Sauron191]

FASCINATING!!! I scratched the surface of lubrication etc during the Corrosion analysis module of my NDT degree AND I actually got to use it once at an engineering works once. Basically a HUGE gear wheel had surface ‘defects’ that didn’t have any type of capillary action pulling in a dye penetrant when tested… Everyone was saying it was porosity (even though it was machined out of an ‘upset forging’) or surface corrosion due to water getting into the system and asked me to retest it. I actually said many times that the surface ‘deformities’ were down to cavitation due to the gear wheel possibly being unbalanced or the lubricant not being sufficient or a combination of the 2 … I basically got looked at as if I was an alien … Anyway this gear wheel was quarantined until the head mechanical engineer came over from Germany, give it a look over and said .. ‘Cavitation due to insufficient properties of lubricant used’ … He also agreed with me that due to the localisation of the cavitation that the gear wheel was most likely out of balance too … So as said, find all this fascinating as I do get it, only at a base level but it all does make sense 👊🏻👊🏻

[@LubricationExplained]

Interesting! So my take on that is it would be unlikely to be cavitation, but micropitting would definitely match what you’ve described.

[@lesliedsouza4077]

Yes, Sir LE :) I like to think, I know a bit - Always good to hear it again... So therapeutic :) That said: There's words, out there: Yes viscosity is all important - In new engine oils, It's Important, to be LOW... Like 0W-16 LOW. As you know. They're saying that Engine base oil, is now just a carrier medium for Additives, to do The Heavy Lifting? If too much oil slips past the piston rings? LSPI? Whatever... Use Push bike, Or, Public Transport? :)

[@TheOmarOtmane]

I just found out about this channel, man it is really amazing, u make complex concepts so simple n easy to understand, thanks a lot, great job.

[@sushijayepheroth1779]

Thank you for this dude , i appreciate this channel.

[@LubricationExplained]

Glad to be of help!

[@jameserayburn]

Outstanding job sir! Thanks for sharing!!

[@LubricationExplained]

Thanks! Glad you found it useful.

[@kisma8362]

A video about TAN and TBN and how the electrode works would be very helpful.. Again a very nice video ,enlighten us !! :))

[@LubricationExplained]

Yes! Definitely looking to do a few videos on TAN and TBN, and the test methodology behind them. While those videos are still in the pipeline, here's one we did on TAN x TBN crossover: kzbin.info/www/bejne/e525nppqjtl-a9U

[@kisma8362]

@@LubricationExplained OOOo many thanks Sir...(I am waiinging for it.).have a nice day there.

[@commenter5469]

The problem with engine lube systems and low pressure alarms is - you need to lift the oil to the top of the cylinder head, to lubricate the valve trane. And the only reading you can judge that action by is the pressure! Plus aside from installing flow meter in the channel from crankshaft and cylinder head - the back pressure induced by oil flow through all the channels in the cylinder head, camshaft bearing journals, rocker journals and lift compensator is only reading is available to monitor that action.

[@mytech6779]

I'm interested in the effect of tackifiers in relation to viscosity. By my eyeball and fingers they seem to increase viscosity of a given base oil but then is there a difference in bearing surface film thickness between the tackified low viscosity base and an untackified higher viscosity base. (such that they end with equal viscosity)

[@chippyjohn1]

I am doing study and will do testing of oil for a car engine that will be used for an aircraft. I'm a mechanic and engineer by passion since I could crawl. I have contacted Australian oil manufacturers about recommendations and some basic questions but they all decline to give any information or advice other than try it and see how you go. I will be modifying an engine significantly including turbocharging. My main concern is the increased and constant load on the big end and main bearings. The engine is recommended to run 10w-40, and design pressure is 4 bar. Other than more load on oil pump and flow through filter, would increasing the pressure in the system provide better shear and load protection on the bearings or would it simply spray more oil out of the clearances? I realise there are many variables, any opinion would be appreciated. Thanks for the videos, they are informative. Much better than so called professionals on the internet describing oil as a lubricant, coolant, cleaner and that's it.

[@LubricationExplained]

Good question - my two cents is that system pressure wouldn't have a noticeable effect on load protection in the bearings. Journal bearings operate on the hydrodynamic regime, which basically uses a wedge (because the diameters of the bearing and bushing are slightly different) to increase the internal pressure of the lubricant massively (to around 14bar) and therefore allow the oil to support load. You'd get a small benefit from increasing system pressure, but if you want to support more load, I'd prefer to go with a thicker oil. Or alternatively a base oil that can provide a thicker lubricant film at the same load (like a full PAO).

[@mechanicalknowledge2692]

Very Important video about viscosity thanks sir😊

[@albertwild4650]

Do you recommend a change of say a group 2 based 10w40 CK-4 Diesel engine oil in a Scania engine to a 5w30 full synthetic (PAO) CK-4 Diesel engine oil?

[@LubricationExplained]

As usual, first consult your manual and see whether the oil is approved. As an example, Scania has an LDF-4 spec for engine oil that many of its newer engines must adhere to. If the 5W-30 synthetic is approved, go for it! You should see better wear protection and a slight improvement in fuel economy.

[@coketey3372]

Do synthethics which have a higher viscosity index number cause leaks on older vehicles? Would you recommend using synthetics on high mileage engines?

[@LubricationExplained]

Great question - theoretically no. What seems to happen sometimes is that when an oil engine has been running on a mineral oil for a long time, deposits are actually sealing gaps. When a high quality synthetic is used the more aggressive detergent package can sometimes remove these, deposits, leading to leaks. Fundamentally using synthetics in high mileage engines should help prolong their life.

[@alouisschafer7212]

Supposedly PAO isn't very kind to rubber seals in old engines.

[@fitness3447]

Great explanation and video (as usual).

[@marcusbarnes5929]

Are there any PAO 5W30 OILS that meet A5B5.

[@user-ox4nl4wn3f]

What actually is viscosity does it means thickness of grease or something else?

[@carlmcfadden4982]

Dose oil loose viscosity 0ver time and use

[@IHadToMakeThisAccount]

As an engine builder i stay away from anything lower that 10w have torn apart way to many engines with so much wear and only around 50k miles.

[@dustinwiggins3686]

I need a refund!😂. Excellent video thank you!