- AMSOIL HQ
- Product Highlights
- Ask AMSOIL
- Small Engines
- Dirt Bike
- Cars & Trucks
AMSOIL vs. Mobil 1* Performance
AMSOIL Signature Series and Mobil 1 are two of the best motor oils, but is one better?
!– [Analytics ID: ] : Not displayed due to domain –>Skip to main content
Oil viscosity is the measure of its resistance to flow. How quickly or slowly motor oil flows affects how well it protects your engine.Learn More
Sign up for bi-weekly updates.