AMSOIL guide
AMSOIL Warranty Guide
Using AMSOIL does not void your factory warranty. United States federal law protects your right to choose any brand of lubricant, and AMSOIL backs its own products with a limited warranty that carries no mileage cutoff. This guide covers both protections, what to do if a dealership pushes back, and where the official warranty documents live.
Your factory warranty is protected by federal law
The Magnuson-Moss Warranty Act is the federal law that governs consumer warranties in the United States. Under it, a vehicle or equipment manufacturer cannot require you to use its own brand of parts or lubricants to keep your warranty, unless it provides those parts or lubricants free of charge.
That protection covers oil brand and it covers products formulated for extended drain intervals. You are free to protect your vehicle the way you think best, including running a synthetic on its published interval.
What the law says, in three points
The protections that matter to an oil buyer come down to three rules.
First, it is illegal for a manufacturer to tie warranty coverage to a specific brand of parts or lubricants unless it supplies them free. Second, you have the freedom to choose how you protect your vehicles and equipment, including lubricants built for extended drain intervals. Third, a manufacturer cannot deny a warranty claim without showing that the aftermarket part or lubricant actually caused the failure.
If a dealership or manufacturer tells you otherwise, you can file a complaint with the Federal Trade Commission, the agency that enforces the act.
The AMSOIL Limited Warranty
AMSOIL warrants that its products are fit for use according to its written recommendations and free of defects in materials and workmanship. Unlike oil brands that guarantee their product only until a specified total vehicle mileage, AMSOIL places no restriction based on how many miles are on your vehicle. AMSOIL stands behind its products for as long as you use them.
The official warranty documents are short reads and worth saving with your maintenance records: the lubricants limited warranty, the filters limited warranty, and the bypass filters limited warranty.
Warranty Secure
AMSOIL labels its products Warranty Secure as a plain-English promise that using them keeps your factory warranty intact. The products are high-performance replacements for the vehicle or equipment manufacturer's branded fluids, not a warranty risk.
The full program details are on the AMSOIL guarantee page, along with the current warranty literature.
If a dealership pushes back
Service departments sometimes tell customers that an oil brand or an extended drain interval voided coverage. Stay calm and put the burden of proof where the law puts it: ask for the denial in writing, along with the evidence that the lubricant caused the specific failure.
Keep your own records simple and strong. Save receipts for every oil and filter purchase, note the date and mileage of each change, and keep any oil analysis reports. A documented maintenance history plus the warranty documents above settles most disputes quickly, and the FTC complaint process backs you up if it does not.
AMSOIL warranty FAQ
Does using AMSOIL void my factory warranty?
No. Federal law makes it illegal to condition warranty coverage on a brand of lubricant unless the manufacturer supplies that lubricant free. Your factory warranty stays intact with AMSOIL in the crankcase.
Do extended drain intervals void a factory warranty?
The law protects your freedom to use products formulated for extended drain intervals, and a manufacturer must prove the lubricant caused a failure before denying a claim. Keep purchase receipts and change records so your maintenance history is easy to document.
How long does the AMSOIL warranty last?
AMSOIL does not cap its product warranty at a total vehicle mileage. The company stands behind its products for as long as you use them, with the specifics spelled out in the lubricants limited warranty document.
Where do I find the official AMSOIL warranty documents?
AMSOIL publishes them as PDFs: the lubricants limited warranty, the filters limited warranty, and the bypass filters limited warranty. The AMSOIL guarantee page keeps the current copies linked.
Protect the vehicle and the warranty at the same time
Run the products, keep the receipts, and let the law do its job. Order online from the AMSOIL online store. To unlock up to 25% off, add an AMSOIL Preferred Customer membership to the same cart and qualifying products switch to member pricing immediately, with no separate sign-up step.