AMSOIL 0W-20 (ASM), 5W-30 (ASL) and 10W-30 (ATM) Synthetic Motor Oils join AMSOIL Signature Series 0W-30 to round out the new Signature Series line. Signature Series 0W-30 is now identified by product code AZO. Product code SSO is discontinued.

In addition to being reformulated to meet the latest API SN Resource Conserving and ILSAC GF-5 industry specifications, the new Signature Series line features all-new packaging and represents the very best motor oils AMSOIL has to offer, allowing motorists to take advantage of maximum extended drain intervals. In the interest of consistency and clarity within the Signature Series line, all four motor oils are recommended for drain intervals of up to 25,000 miles/one year, whichever comes first (15,000 miles/one year in severe service conditions).

With the recent introduction of OE Synthetic Motor Oil and the recent reformulation of XL Synthetic Motor Oil, Signature Series Synthetic Motor Oil provides AMSOIL customers with three distinct lines of high-quality synthetic motor oil, allowing performance-minded customers to have a high quality option for every application they encounter.