
AMSOIL Extended-Life Motor Oil provides enhanced protection and convenience.

Automaker data from the field suggests that Low-speed pre-ignition (LSPI) is still a problem. A LSPI test for used motor...

AMSOIL synthetic motor oils achieved 100% protection against LSPI in industry-standard testing.

Do you hear an engine knocking sound when you hit the gas? It could be due to pre-ignition or detonation....

First Signature Series Synthetic Motor Oil, then XL Synthetic Motor Oil. Now, OE Synthetic Motor Oil is our latest oil...

So, what’s new about reformulated XL Synthetic Motor Oil? In essence, XL protects better for longer, yet costs the same...