Ok to use 5w-30 in 4.0?
As the thread title states, is it OK to use 5w-30 in the 4.0? I normally use 10w-30, but just used up my stash in the wife's car. I have a whole case of 5w-30 here, and the only vehicle that takes it is up for sale. If it's a no go, I'll stop being cheap and go buy some, but I'm hoping to be able to use what I already have.
It's not an addiction. It's a way of life.