,,AMSOIL 5w30 Signature Series 100% Synthetic

Signature Series 100% Synthetic Motor Oil
Advanced Motor Oil Technology
AMSOIL was founded on innovation, beginning with our introduction of the world's first API-qualified synthetic motor oil. By ignoring commonly accepted limitations and refusing to stop short of success, we set a new benchmark for lubricant performance. These same principles continue to guide our product development, resulting in Signature Series Synthetic Motor Oil. Signature Series is not only the best oil we have ever made, it's also better than any competitor oil we have tested. Some may claim that Signature Series is over-engineered. Perfect. It's not for everyone. It's for those who want the absolute best engine protection and it delivers.

Protects Against Engine Wear
Signature Series Synthetic Motor Oil develops a strong fluid film that keeps metal surfaces separated. Its robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life. The Sequence IVA Engine Test, which must be passed to meet the API SN PLUS specification, simulates extended periods of stop-and-go driving. For 100 hours, the test engine cycles between 50 minutes of idling and 10 minutes of elevated rpm-conditions that encourage engine wear. The camshaft is then measured for wear in 84 locations and an average score is determined.
We used Signature Series OW-20, the lightest viscosity in the line, to further increase the severity of the test. AMSOIL Signature Series Synthetic Motor Oil provided 75% more engine protection against horsepower loss and wear than required by the industry standard, extending the life of vital components like pistons and cams.

Protects Pistons from Low Speed Pre-Ignition We armed Signature Series with an advanced detergent system that protects against harmful deposits and low speed pre-ignition (LSPI). Most new engines feature gasoline direct injection (GDI), often combined with a turbocharger to boost power and improve fuel economy. Motor Oil achieved 100% protection against LSPI' in the engine test required by the GM dexos1* Gen 2 specification-zero occurrences were recorded throughout five consecutive tests

Protects Turbochargers
Our unique synthetic formulation is inherently stable to resist oxidation and neutralize acids. Signature Series Motor Oil provides outstanding protection against deposits common to high-temperature engine environments. The tremendous heat and stress turbos create can cause some oils to break down and form harmful bearing deposits through a process known as turbo coking. Over time, turbos can suffer reduced performance or fail altogether.
We challenged Signature Series to the GM Turbo Coking Test, which consists of 2,000 cycles of extreme heat soaks. An oil must limit the temperature change within the turbocharger to 13% or less to pass the test. Signature Series limited the temperature increase to only 3.6%, protecting the turbocharger 72% better than required² by the GM dexos1 Gen 2 specification.