Long story short my sister has an 08 Toyota 4Runner V6 and she has fallen on some hard times so to save her some $ I told her I would change her oil for free if she pays for the oil. So her husband passed away last year and he has a stash of 10w40 in different brands he use to run in his old plow truck that is now gone. Can I run this in her 4Runner this spring and summer?