Oil viscosity fundamentals explained 

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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 😬

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.

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

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 👊🏻👊🏻

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? :)

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.

Thank you for this dude , i appreciate this channel.

Very Important video about viscosity thanks sir😊

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

Outstanding job sir! Thanks for sharing!!

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.

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)

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.

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

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?

Great explanation and video (as usual).

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

Dose oil loose viscosity 0ver time and use

Are there any PAO 5W30 OILS that meet A5B5.

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

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.