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OEM New Vehicle Warranty

Automakers cannot deny warranty claims solely on the basis of using synthetic motor oil, and they cannot specify a certain oil brand to be used in their vehicles. Instead, they require the oil meets the appropriate API performance classification and SAE viscosity grade specified in the owner’s manual.

“Installation or the use of special materials does not, in and of itself, void the New Vehicle Limited Warranties.”
Service and Parts Operations, Chrysler Corporation

Many high performance vehicles are factory filled with synthetic motor oils and the manufacturers encourage continued use of synthetic motor oils in order to achieve maximum performance, including Cadillac, Chevrolet Corvette and Dodge Viper. Many other automobile manufacturers neither recommend or discourage the use of synthetic motor oils, requiring only that the oil meets a certain viscosity grade and performance classification.

Automakers may not void warranties based solely on an owner’s practice of extending oil drain intervals. Dealership personnel and district managers may be unaware of the serviceability of synthetic oils over an extended period, but they may not summarily dismiss a warranty claim based on the owner’s practice of changing oil at extended intervals. To do so does not disprove a defect in manufacture or workmanship as the immediate cause of failure.

Vehicle owners may appeal to a factory representative if the dealership and district manager do not satisfactorily settle the warranty claim. Factory representatives appreciate the value of used oil analysis and do consider preventive maintenance oil analysis reports in their evaluations of warranty claims, while postfailure oil analysis is critically important to the disposition of a warranty claim. Their findings pull more weight than the opinions of dealerships or district managers.

“If engine damage otherwise covered by warranty was found to be unrelated to the engine lubricant, then the consumer’s practice with regard to oil change intervals would not be a relevant consideration, and the warranty claim would be honored.”
Fuels and Lubricants Division, General Motors Research Laboratories

If used engine oil is discarded without an independent analysis, the dealership and vehicle manufacturer lose their evidence to support a claim that the oil, and not a mechanical problem, caused the failure. For example, sludge may be formed through several avenues, not all related to the oil’s performance. Antifreeze contamination or nitration due to poor electronic sensor performance may cause sludge, and both may be directly related to a defect in vehicle manufacture or workmanship, but clearly neither may be blamed on the oil.

“The New Vehicle Warranty would not be void simply because an owner failed to use proper engine oils or did not perform maintenance at the prescribed intervals. Warranty applicability is contingent upon the cause of failure.”
Service Policies and Procedures Department, General Motors Corporation

Vehicle manufacturers base their owner’s manual maintenance recommendations on their own research and to best protect their equipment based upon lubricants of varying quality, reliability and value in the marketplace. A move toward extended drain intervals is in progress now. Ford recently extended its recommended drain interval to 7,500 miles in normal service conditions, while GM has been recommending increased intervals when indicated by its oil monitoring system.

AMSOIL offers superior synthetic motor oils fully capable of providing extended drain service. AMSOIL is committed to backing its products, as well as protecting the interests of its customers. Therefore, AMSOIL INC. offers its customers a warranty.

“AMSOIL INC. warrants that the use of its lubricants will not cause mechanical damage to any mechanically sound equipment when AMSOIL INC. products are used in full compliance with the company’s recommendations and instructions.”

AMSOIL synthetic motor oils are formulated to surpass engine test specifications, offering protection far greater than competing motor oils for extended drain intervals.

Most synthetic oil manufacturers make no claim to extended drain intervals, deferring to the maintenance schedule provided by the vehicle manufacturer. With its unparalleled oil and warranty program, AMSOIL offers consumers unprecedented protection and economics.

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