Originally Posted By: apwillard1986
The thread title was 0w-20 and Warranty. You went to the source and they answered. The question was can I run it and maintain my warranty?
the answer is "yes, he can use it and maintain his warranty". It wouldn't be the first time someone got bad information from a CS rep, and it won't be the last. If they said he had to use Quaker State (since that's what the owner's manual recommends), would that make it true? No, it wouldn't... Someone saying something doesn't make it fact.
0W20 meets all of the operational standards of 5W20--it simple exceeds some of them, which is why it's labeled as 0W. Manufacturers seem to be reticent to even mention 0W20, given the pushback many have had in recommending it (hard to find, expensive...). But in time, the owner's manuals will be updated. But let's not blame the poor shmoe answering the phone. They're just repeating the information given to them. That doesn't make them stupid or idiots. They're just uninformed about motor oil. And ultimately, it's the engineering department's job to inform those folks so they can correctly answer the question.
Using an SN-rated GF-5 0W20 will not void your warranty if the car allows 5W20, and I'll dare anyone to provide a single warranty claim denied because of it. This is a lot of hand-wringing over nothing.