This is a common myth. According to the Magnuson Moss warranty act, the failure would have to be proven (by the manufacturer) to be directly related to an oil lubrication problem, and further proven to be the result of your abuse. You would practically have to drain the oil out of your engine and run it for weeks. You do NOT have to prove maintenance records are in order if the failure is not directly related to the lack thereof.

If anyone tries to tell you differently, bring them a copy of the act.