Science Friction: Squeezing the snake out of the oil!

[Challenger RTA]

Break in oil. short and simple.

Do Classic Cars (1951-1996) Actually NEED Special Oil?

NOTE: This video is NOT about flat tappet camshaft break-in or racing engines. Please refer to this video about cam break-in. https://youtu.be/Fj2NSteaPnM?si...

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Good analogy of paint thickness.





Rubber bands stretch and break

LAB RESULTS: Pennzoil Ultra Platinum vs Mobil 1's NEW Formula

There are three different formulas of 0W-40 Mobil 1, and one of them is a brand NEW formula. How do they compare to Pennzoil Ultra Platinum 0W-40?Let's take ...

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[Xcudame]

Very good videos. I have never used a break-in oil because by the time I assembly everything, check clearances and tolerances, run the oil pump with a drill motor while turning the engine by hand, the engine is pretty much broken in! I still use STP which some claim is not good, but I built engines with 100,000+ miles on them.

The machine shop, where I worked as a crankshaft grinder, used to parkerize all their camshafts, used assembly lube and ran the short blocks and long blocks in on an engine stand that turned the engine between 1000 and 2500 rpms. They checked all clearances and tolerances. That's why they had less than one percent "comebacks"!! And digging into the returns, 90%+ were costumer screw ups! Sometimes we just got a bad part, but very rare.

By the way, some rings seat much faster than others! Cast rings (no coating) seat very quickly. Chrome rings are seated before they ever go in the box! Moly rings are a pain to seat but last a long long time.

 

[Challenger RTA]

An other view point.

 

[540HemiCuda]

Very good videos. I have never used a break-in oil because by the time I assembly everything, check clearances and tolerances, run the oil pump with a drill motor while turning the engine by hand, the engine is pretty much broken in! I still use STP which some claim is not good, but I built engines with 100,000+ miles on them.

The machine shop, where I worked as a crankshaft grinder, used to parkerize all their camshafts, used assembly lube and ran the short blocks and long blocks in on an engine stand that turned the engine between 1000 and 2500 rpms. They checked all clearances and tolerances. That's why they had less than one percent "comebacks"!! And digging into the returns, 90%+ were costumer screw ups! Sometimes we just got a bad part, but very rare.

By the way, some rings seat much faster than others! Cast rings (no coating) seat very quickly. Chrome rings are seated before they ever go in the box! Moly rings are a pain to seat but last a long long time.

I am another one who has never used break-in oil. Just don't see the need for it. And I agree with that start up procedure. The only difference for me may be that I usually groove the cam or have the cam grinder groove the cam journal that feeds the rockers. That does bleed off some oil pressure due to the additional flow up top, but if everything is as it should be, that shouldn't be an issue. And I will say that grooving the cam journal is not necessary, especially on a street engine with mild spring pressure. Just another overkill procedure that I can't seem to resist doing.