I don't think it is a problem, if it is, its ridiculous. I had 5 qts. of Amsoil 5w-30 left over and had Ford put it into my wife's Focus. They didn't say anything about voiding the warranty.
You also have to remember that most likely, your engine will never fail due to the oil in it, unless you never changed it. If you have a Toyota with the sludge engine, thats a different story. I think some of the manuals for these new cars say you can use a 30wt., they just prefer a 20wt. I hope we see results come in to suggest that this new wave of 20wt oils are going to hold up. I say this bc the benefit of a 20wt., other then cold starting, is so insignificant in terms of gas MPG, which is why these wts. are coming around. With Mobil 1 too, your looking at a light 30wt. so it should be a great fit for your vehicle. Go for it!
![[Smile]](images/icons/smile.gif)
BTW, 0w-20 should be out in March.
[ February 09, 2003, 05:51 PM: Message edited by: buster ]