SS Series Diesel Group

Signature Series Max-Duty Synthetic Diesel Oil
Use in vehicles that require API CK-4, CJ-4 or CI-4+
The top tier of AMSOIL protection and performance for diesel engines. Provides 6X more engine protection.1 Delivers up to 60% better turbo cleanlinessJ and withstands the extra demands you place on the turbo when pulling heavy loads or updating the tune for maximum horsepower. Provides up to 76% less oil consumption than required by the API CK-4 standard in the Caterpillar-1N oil consumption test.

Heavy Duty Diesel Group

Heavy-Duty Synthetic Diesel Oil
Use in vehicles that require API CK-4, CJ-4 or CI-4+
Outstanding protection and performance for customers seeking an upgrade over conventional and other synthetic diesel oils. Provides 4X more engine protection.
1 Provides up to 66% less oil consumption than required by the API CK-4 standard in the Caterpillar-1N oil consumption test.

CI-4+ Synthetic Diesel Oils

Exceeds both 10W-30 multi-grade and SAE 30 straight-grade viscosity requirements. Provides outstanding performance in pre-2007 diesel engines in on-road applications as well as all model-year diesel engines in off-road apps. Also recommended for gasoline engines requiring API SL or previous specifications.