[gc4x4]

Im going to change the oil in both diffs this weekend and was wanting to use Valvoline 80w-90 oil since i already have it available, i know the factory calls for 75w-85 but will this weight oil be ok to use? i just don't want to buy more oil if i don't have to. Thanks:thumbsup:

 

[The Evil Twin]

As long as it is GL-5 it will be fine. The difference in viscosity is minimal, and you don't live up in the great white north.