Originally Posted By: Bullwinkle007
I believe the only purpose to a 0/20 oil is for an engine company to make higher gas mileage for EPA bullcrap. Will each individual actually see w difference in fuel mileage between a 0/20 and a 5-30? Maybe 1mpg, to an individual that's nothing but mutiply that times all the vehicles.
Next question will an engine last longer on a 5-30 or a 0-20?
If you had to ask the question then apparently there is no evidence that 20wt oils cause shorter engine life, since engine builders have been calling for 20wt oils now for 12-15 years. I even used M1 5-20 in my Dodge engine in 1978 with no problem except a little more oil use than the 10-40 Valvoline I started with.
Since you have problems with 20wt oils then use somin else. For me, I chose 0-20 for clean engines, smooth engines, nice cold temp starts, smooth acceleration, moderate 10K OCIs, quite and long lasting timing chains, very long engine life, great protection in high temps, very low oil consumption, and if there are other reasons I think of you all will be the first to know.