Oil change
I have an 06 Workhorse 8.1 I have been running 5 30 Valvoline I have 55.000 miles now and was wondering If I should change to 10 30 or go to Mobil 1 or just stay with what I have been doing ! I live ...
Forum Discussion
The first number really doesn't factor in during warm weather. That is the cold weather weight. 5 or 10w30 has about the same flow characteristics in warm weather because it is the 30 weight that matters.
