Quote:
Originally Posted by rrgrassi
I understand all about filtering the oil, and so on and so forth. Now what about the fact that oil viscosity does break down due to heat and shearing pressures? How does leaving oil in for an extended amount of time equate to longer engine life? So it seems we can achieve clean oil that is used past it's prime. Am I missing something?
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A good quality synthetic does not break down like a dino based oil. Thats why people can go thousands and thousands of miles on the same oil. This is well documented and backed up with oil analysis. The bypass filter is a good idea even if you don't run synthec oil or want to run your oil forever. Cleaner oil(NO soot) = longer engine life.