Signature Series 5W-20 100% Synthetic Motor Oil
Signature Series 5W-20 100% Synthetic Motor Oil is AMSOIL's top-tier full synthetic — 75% more wear protection, 100% protection against LSPI and a guaranteed 25,000-mile / 1-year drain interval, built for turbocharged and direct-injection engines.1
Why this product
- 75% more wear protection for longer engine life.1
- 100% protection against LSPI — safeguards modern turbo & direct-injection engines.2
- Guaranteed up to 25,000 miles or 1 year between oil changes.
Find your fit
Pick your vehicle in the AMSOIL Garage to confirm the right AMSOIL products for your Toyota or Lexus.
Save up to 25% for life
Become a Preferred Customer under Tuned Yota — wholesale pricing (up to 25% off retail), points, exclusive promotions and free gear. The membership pays for itself in about two oil changes.
Become a Preferred Customer →Signature Series 5W-20 100% Synthetic Motor Oil — FAQ
Up to 25,000 miles or one year, whichever comes first — guaranteed. Turbocharged vehicles fall under the normal-service category. Always change the oil filter when you change the oil.
No. Using AMSOIL synthetic lubricants does not void your vehicle or equipment manufacturer's warranty, and all AMSOIL lubricants and filters are covered by the AMSOIL Limited Warranty.
Enroll once as a Preferred Customer under Tuned Yota and save up to 25% on every order, for life. Or buy at retail with no account — either way it ships direct from AMSOIL.
Keep reading
1 Based on independent testing of AMSOIL Signature Series 0W-20 (ASTM D6891). 2 Based on zero LSPI events in five consecutive GM dexos1 Gen 2 LSPI tests of Signature Series 5W-30. Price shown is AMSOIL's current online retail price, synced weekly. Checkout completes on amsoil.com; orders are sold, shipped and fulfilled by AMSOIL Inc. Tuned Yota is an Authorized AMSOIL Dealer.