Amsoil's warranty has huge holes in it. The final thing is that the car or truck owner doesn't want to find the cause of his engine problem, he just wants it fixed. Amsoil requires:
--quote--
Customer shall also, within 30 days of failure, notify AMSOIL INC. and provide the following:
(a.) An eight (8) ounce representative oil sample taken from the failed equipment and put into a clean container.
(b.) Documentation including make, model, and year of equipment, total accumulated miles and/or hours, and duty cycle or service environment.
(c.) Equipment or vehicle maintenance history documentation including miles or hours at the time of AMSOIL lubricant installation, general equipment repairs, and oil analysis results if available.
(d.) Proof of purchase for AMSOIL lubricant.
(e.) Batch number from oil container or Certificate of Analysis.
--end quote--
Who could provide all this stuff after his car was towed into a dealership and the first thing they do is to drain the oil and pull the pan? Who's got the batch number from the empty oil bottle?
Amsoil also excludes:
"Failure of equipment due to a pre-existing condition that is unrelated to the use of AMSOIL." and, "Failure was the result of an OEM defect."
So some poor schmuck is running his Amsoil 0w30 for 11 months and 34,000 miles when something breaks in his engine. He just wants his engine fixed. The dealership denies his warranty claim because he didn't change his oil on schedule. What does the guy do now? His oil is in the recycling tank, his engine is in pieces, nobody knows if the damage is caused by the oil, by a pre-existing condition or OEM defect, and his car isn't getting fixed.
Ken