P.i. Performance Improver Gasoline Additive
P.i. Performance Improver Gasoline Additive is an extremely potent, concentrated detergent additive — unsurpassed in removing damaging fuel-injector, intake-valve and combustion-chamber deposits. It cleans your entire fuel system and restores power and performance in one tank of gasoline, and it's excellent for direct-injected (GDI) and port-injected engines. Treats 30 gallons; use every 4,000 miles.
Why this product
- Deep-cleans the entire fuel system — injectors, intake valves and combustion chambers — in one tank.
- Restores power, performance and fuel economy; helps reduce emissions.
- Excellent for gasoline direct-injected (GDI) and port fuel-injected engines; capless-compatible bottle; E85-safe.
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Become a Preferred Customer →P.i. Performance Improver Gasoline Additive — FAQ
P.i. is the deep-cleaning additive — it cleans the entire fuel system and restores like-new performance every 4,000 miles. Upper Cylinder Lubricant is the maintenance product — it lubricates upper cylinders, fights ethanol corrosion and keeps injectors clean at every fill-up.
Yes — both products can be used together in one tank of gasoline. Deep-clean with P.i. every 4,000 miles, keep clean with Upper Cylinder Lubricant every tank.
Yes — they're formulated for all gasoline engines, including the direct-injected and turbocharged engines across the Toyota and Lexus lineup, and they're compatible with E85 and capless fuel systems.
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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.