Originally Posted By: stchman
I am speaking about if an engine was not put together properly when it was made.
Right, and in such a case, it's not the oil company's problem. With respect to most of the oil companies' warranties, I'm skeptical about most of them. Ironically, I find XOM's to be the most straightforward and honest.
Most companies are a little silly when they try to have a time limit or limit OCIs to 3000 miles and under only or excessively push exclusivity. Realistically, if an oil causes a failure and you chose the correct oil and filter and followed appropriate maintenance practices and can prove the oil was the issue, the oil company will be on the hook, end of story. Of course, I'm defining some very, very specific circumstances. I doubt that oil companies' warranties need to be as specifically worded as they are. That is what I like about M1's warranty.
It's a 10000 mile (or longer, depending on factory OCI) warranty. All it really asks you to do, aside from the appropriate OCI, is to ensure you use the proper viscosity and a specified filter and not have pre-existing conditions.
On the other hand, with QS's payout warranty, I do understand their demand for product loyalty. If they are to pay you some cash after some obscene amount of miles, they have every right to have expected that you use QS for almost the entire time.