Synthetic engine oil

3 Levels of High Performance Motor Oils - 25k, 10k & OEM

AMSOIL Signature Series Line (25 k mile/1 yr drain interval)

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 will be discontinued and is only available while supplies last.

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).  Click to see 25 k mile oil page.

AMSOIL XL Extended Life Synthetic Motor Oils (10 k mile/6 mo drain interval)

AMSOIL XL Extended Life Synthetic Motor Oils provide better wear control, high- and low-temperature protection and increased fuel economy compared to conventional oils. Formulated with extended-drain boost technology, AMSOIL XL Synthetic Motor Oils provide superior performance for up to 10,000-miles/six months, or longer when recommended in owner’s manuals or indicated by electronic oil life monitoring systems. Click here to See all the 10k mile oils.