What does synthetic oil do for my car that regular oil does not?
In: 641
I thought the actual weight of the oil was what it is @ one temperature versus elevated temperature. I.e. 5W20 is less viscous at lower temp than 10W20, but once they get up to temp they have the same viscosity. So viscosity of synthetic and ‘regular’ should be the same for the same weight oil. Thought synthetic took longer to break down due to less impurities
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