That's why AMSOIL is the choice of professional riders and weekend warriors everywhere. AMSOIL Synthetic Dirt Bike Oil's superior friction-durability properties help minimize clutch slippage, fade and chatter, giving riders consistent clutch feel during takeoffs or when maneuvering around obstacles on the trail.

Great product and I now have zero petroleum based oil on my property. Yes, I would recommend this to a friend. I've been using this for years and am completely satisfied, great product and fast shipping. Yes, I would recommend this to a friend.

The short answer? We think AMSOIL Signature Series Synthetic Motor Oil is the best synthetic motor oil.

AMSOIL formulates a wide selection of synthetic lubricating oils for all types of engine and gear applications, including those for specialized vehicles and severe operating conditions.

Not only does AMSOIL exceed industry standards and outperform competing brands, it fights viscosity breakdown 46% better than Mobil 1. It's built to stand up to the devastating effects of high-horsepower, modern engines and provide maximum protection.

A rule of thumb for AMSOIL Signature Series Synthetic Motor Oil is guaranteed for 25,000 miles/12 months (15,000 miles/12 months in severe service). AMSOIL XL Synthetic Motor Oil is guaranteed for 10,000 miles/6 months, or longer where recommended by electronic oil life monitoring systems.

Signature Series Synthetic Motor Oil Normal Service – Up to 25,000 miles (40,200 km), 700 hours of operation or one year, whichever comes first, in personal vehicles not operating under severe service. Severe Service – Up to 15,000 miles (24,140 km), 700 hours of operation or one year, whichever comes first.

Normal Service – Up to 25,000 miles (40,200 km), 700 hours of operation or one year, whichever comes first, in personal vehicles not operating under severe service. Severe Service – Up to 15,000 miles (24,140 km), 700 hours of operation or one year, whichever comes first.

Superior, Wisconsin Formulated, blended and packaged in the USA right. here in Superior, Wisconsin. 🇺🇸 Head to www.amsoil.com to order now!

Answer: AMSOIL synthetic motorcycle oils are engineered to provide outstanding protection for up to twice the manufacturer's recommended change interval or one year, whichever comes first.

Synthetic Oil Change Interval Most synthetic oils are rated to last between 10,000 to 15,000 miles, or six months to a year. Manufacturer recommended ratings are typically applied to "normal driving," and don't reflect severe driving conditions that may require more frequent oil changes.

“While synthetic generally holds up better and can serve for more miles, it is equally important to not extend oil changes beyond the time interval recommended by the manufacturer - typically six months or a year if it is a motor that is not driven many miles or on many short trips.”