T Tom L Member Dec 18, 2004 143 0 May 13, 2005 #1 If I mix 10w30 and 75w90, do I get the average of 42.5w60 ??? I like 20w50, but wanted to try slightly thicker. I'm afraid 75w90 is way too thick and I don't think **w60 exists.
If I mix 10w30 and 75w90, do I get the average of 42.5w60 ??? I like 20w50, but wanted to try slightly thicker. I'm afraid 75w90 is way too thick and I don't think **w60 exists.