5w20 or 10w30?
04-08-2008, 07:42 AM
#21
5th Gear Member
Join Date: Apr 2007
Location: The High Country
Posts: 3,547
RE: 5w20 or 10w30?
I ran at 80 mph when it was 114* last summer all across the Utah, Nevada and S. Cali desert with coolant temps staying in the normal range and no oil related problems. Still don't have any as a result of the trip either. At that time, I was using M1 5W20.
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