Originally Posted by
JEFASOLD
A quick question for the experts. Would using 75w-90 in the diff be harmful? I want to change mine and a friend has 2 qts of 75w-90 GL5 that he will give me but I don't want to foul anything up. The diff is one place I have no experience with yet on these cars, I don't know how touchy they are. Thanks.
API stands for American Petroleum Institute and GL-5 is a API quality standard.
Mobil 1 is a GL-5 oil and is the quality required in the Crossfire differential.
I just have to get around to take it off the shelf and put it in. That and change the power steering oil, Pentosin CHF 11S.