Signature Series Synthetic Motor Oil

Available in seven viscosities
Signature Series Synthetic Motor Oil

0W-20

Signature Series 0W-20 Synthetic Motor Oil is Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion.

Signature Series Synthetic Motor Oil

0W-30

Signature Series 0W-30 Synthetic Motor Oil has 75 percent more engine protection against horsepower loss and wear than required by the industry standard, extending the life of vital components like pistons and cams.

Signature Series Synthetic Motor Oil

0W-40

Signature Series 0W-40 Synthetic Motor Oil develops a strong fluid film that keeps metal surfaces separated. Robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.

Signature Series Synthetic Motor Oil

5W-20

Signature Series 5W-20 Synthetic Motor Oil delivers powerful protection. How good is it? An independent lab compared AMSOIL synthetic motor oil head-to-head against a leading competitor in a 100,000-mile test.

Signature Series Synthetic Motor Oil

5W-30

Signature Series 5W-30 Synthetic Motor Oil is barely challenged by the industry-standard testing, demonstrating only a 0.1% viscosity increase. Even when the test length is doubled, AMSOIL delivered twice the viscosity control.

Signature Series Synthetic Motor Oil

5W-50

Signature Series 5W-50 Synthetic Motor Oil is Formulated with superior thermal durability that resists breakdown and keeps pistons clean. Controls heat and minimizes performance-robbing deposits. Maximizes engine life!

Signature Series Synthetic Motor Oil

10W-30​

Signature Series 10W-30 Synthetic Motor Oil is fortified with a heavy treatment of detergent additives, delivering 28 percent more acid-neutralizing power than Mobil 1 and helping engines stay cleaner, longer.