
Quantifying Performance: Signature Series Motor Oil and the NOACK Volatility Test
Signature Series delivered 2X better protection against volatility, helping reduce oil consumption, minimize top-offs and keep engines cleaner.
Laboratory tested and proven on the road.
See how AMSOIL products perform in the lab and in the field.
Check out the tests
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.