In all my years the only engine failure that I know of other than a commercial engine failure was a friends wife's 1995 Chevrolet Lumina van's 3.1L V-6. She had just left the Chevy dealer after getting an oil change and drove approximately a mile to interstate 84 and was accelerating on the entrance ramp when a connecting rod broke and ripped through the block dumping all the oil onto the interstate. The van was towed back to the dealer who had done all the maintenence on the vehicle including oil changes every three months and the vehicle was still under warranty (the vehicle was 32 months old and had 33,000 miles on the odomoter) bought new from that dealer. Chevrolet denied the warranty claim stating she had abused the vehicle by accelerating too fast entering the interstate and on top of that the dealer would not give them any kind of a deal on a new motor so they had a new motor installed at a private shop which was cheaper than having it done at the dealer. That vehicle is still in use today being used by their son. So the point is any company will do what ever they can to deny a warranty claim so don't make it easy on them by not following their maintenence schedule.