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 Developed to protect the horsepower diesel enthusiasts crave and extend the life of hard-working commercial equipment in the most severe conditions. Signature Series synthetic technology delivers max-duty protection in on- and off-road applications. 

 Provides filtering efficiency of 99 percent at 20 microns1

Allows lower restriction, keeping engine parts lubricated

Provides greater capacity for small, wear-causing contaminants than competing filters

Helps reduce engine wear

 Signature Series Synthetic ATF is formulated with high concentrations of antioxidants, making it naturally heat resistant. It provides outstanding protection against sludge and varnish deposits that clog narrow oil passages and contribute to clutch glazing. After 180,000 miles in severe service, fluid analysis revealed Signature Series Multi Vehicle Synthetic ATF contained 83 percent of its original oxidation inhibitors, proving its long-lasting resistance to thermal breakdown. 

 AMSOIL SEVERE GEAR 100% Synthetic EP Gear Lube excels in hot and cold temperature extremes. By design, it resists breakdown from high heat, preventing acids and carbon/varnish formation. Its waxfree construction also improves cold-flow properties, improving fuel economy and cold-weather shifting. As the graph shows, SEVERE GEAR delivers 20 percent more cold-temperature protection than required by the industry standard. 

 AMSOIL Diesel Injector Clean + Cetane Boost (ADS) combines the superior detergency and improved lubricity of AMSOIL Diesel Injector Clean and the increased horsepower and cetane of AMSOIL Cetane Boost in one convenient package.