<VV> Old Oil

[FrankDuVal]

Mostly an "old wives tale".

Just like all new things, someone has an issue and blames it on the new 
product. Tells all his friends, due to the 9/1 complaint rule.* See 
issues with DOT 5 in vehicles. Usually just operator error in filling 
the fluid full of air bubbles from improper bleeding techniques. Or, 
"Don't use detergent oil in an old engine that ran non-detergent all its 
life". Usually an engine that was already worn out and now that it 
failed after detergent oil was put in it, must have been the oil's 
problem, not the already worn out parts!

Just use the same viscosity synthetic that you used in dino oil. If you 
use 0-20 in a worn engine, I would expect it to leak more....

The synthetics for tighter clearances are the 0-20, 0-30 etc oils.

*If you have great service form a company, you might tell one person. If 
you have a bad experience, you might tell 9 people!

Frank DuVal

On 8/6/2020 3:53 PM, Hugo Miller via VirtualVairs wrote:
> I have always shied away from synthetic oils in old engines. I have 
> heard bad things about it, but I have no idea whether they are just 
> rumours or based on science? Isn't it supposed to leak past the oil 
> seals - or is that just a myth? And isn't it designed for closer 
> bearing tolerances?