AMSOIL 100% SYNTHETIC CHAINCASE & GEAR OIL

AMSOIL 100% Synthetic Chaincase & Gear Oil is a purpose-built extreme-pressure lubricant engineered to protect the enclosed chains and gears in snowmobiles and ATVs. It delivers the right combination of film strength, cold-weather fluidity, and shear stability that generic fluids simply cannot match.

Snowmobile and ATV chaincases operate under punishing conditions. Tight tolerances, high RPMs, extreme cold starts, and heavy mechanical loads all conspire to break down lubricants quickly. Many riders default to automatic transmission fluid or automotive gear lube in their chaincases, but neither product is designed for these applications. ATF lacks the extreme-pressure additives chains and gears need, leaving metal surfaces vulnerable to accelerated wear. Automotive gear lube, formulated for hypoid gears, is too thick for proper chain and gear lubrication in powersports applications, impairing circulation and sapping energy.

EXTREME-PRESSURE PROTECTION FOR CHAINS AND GEARS
Chain-driven powertrain systems concentrate enormous loads on small contact patches. AMSOIL Synthetic Chaincase & Gear Oil is formulated with extreme-pressure additives that maintain a durable protective film under high loads and high temperatures. In Four-Ball Wear testing (ASTM D4172B at 40 kg, 75°C, 1200 rpm, 1 hr), it produced a wear scar of just 0.39 mm, confirming strong anti-wear performance where it counts most. This translates directly to longer chain and sprocket life in snowmobiles like Ski-Doo, Arctic Cat, Polaris, and Yamaha models, as well as ATVs from Bombardier/Can-Am.

COLD-TEMPERATURE FLUIDITY FOR IMMEDIATE PROTECTION
A chaincase oil that thickens up in sub-zero conditions creates drag, wastes energy, and leaves components unprotected during cold starts. AMSOIL Synthetic Chaincase & Gear Oil has a pour point of -46°C (-51°F), so it flows freely even in the harshest winter riding conditions. That low-temperature fluidity means the oil reaches chain and gear surfaces immediately on startup, reducing dry-start wear and delivering maximum power transfer from the motor to the track or wheels. Riders in northern climates and mountain terrain will notice smoother cold-temperature takeoffs and reduced drivetrain drag compared to conventional chaincase oils.

SHEAR STABILITY AND LONG-LASTING PERFORMANCE
Conventional chaincase fluids break down under mechanical stress, losing viscosity and film strength over time. AMSOIL Synthetic Chaincase & Gear Oil is a 100% synthetic formulation that resists shear and chemical breakdown better than conventional fluids. With a viscosity index of 136 (ASTM D2270) and Noack volatility of just 5.1% weight loss (ASTM D5800), this oil maintains its protective properties and viscosity profile throughout extended service intervals. It also inhibits rust, corrosion, oxidation, and foam, keeping chaincase internals clean and protected even during seasonal storage.

DESIGNED FOR ARCTIC CAT DIAMOND DRIVE GEARCASES
AMSOIL Synthetic Chaincase & Gear Oil is specifically engineered for use in Arctic Cat Diamond Drive gearcases, a common application where the wrong fluid can lead to premature component failure. It also serves as a direct replacement for OEM chaincase fluids from Arctic Cat (Synthetic Chain Lube, Synthetic ACT Gearcase Fluid), Bombardier/Ski-Doo/Can-Am (XPS Mineral and Synthetic Chaincase Oil), Polaris (SCL Synthetic Chaincase Lubricant), and Yamaha (Snowmobile Chaincase Lube).

SPECIFICATIONS AND COMPATIBILITY
AMSOIL Synthetic Chaincase & Gear Oil is compatible with both conventional and synthetic chaincase oils. Mixing with other oils will reduce its performance benefits, so a full fluid change is recommended for best results. It replaces a wide range of OEM-specified chaincase and gearcase fluids across all major snowmobile and ATV brands.

SERVICE LIFE
AMSOIL recommends following the drain interval established by the original equipment manufacturer for your specific snowmobile or ATV application.