Fuel Additive · AMSOIL stock no. UCLCN-EA
Upper Cylinder Lubricant Corrosion Inhibitor
Upper Cylinder Lubricant Corrosion Inhibitor lubricates upper cylinders to fight wear, inhibits ethanol-related corrosion and keeps injectors clean — extending engine life at every fill-up. It delivers 18% more lubricity than Lucas and 20% more than Sea Foam for better retention of horsepower and fuel economy.1 Treats 25 gallons; use every tank.
- Lubricates upper cylinders to fight wear — extending engine life at every fill-up.
- Inhibits ethanol-related corrosion and keeps injectors clean.
- 18% more lubricity than Lucas, 20% more than Sea Foam for better retention of horsepower and fuel economy.1
- Designed to work hand-in-hand with P.i. Performance Improver; capless-compatible; E85-safe.
1 Based on independent testing of AMSOIL Upper Cylinder Lubricant, Lucas Upper Cylinder Lubricant and Sea Foam Motor Treatment obtained on 02/13/2019 using ASTM D6079 modified for use with gasoline.
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Your next step
- Confirm the fit. Open the vehicle list above and match your year and engine.
- Check the product page. Capacity, what it does, and the AMSOIL claim basis.
- Order from AMSOIL. Use any Buy link: it opens AMSOIL.com and credits Tuned Yota. Preferred Customer pricing is available only through registration; it is a paid membership.
Frequently asked questions
What's the difference between P.i. and Upper Cylinder Lubricant?
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.
Can I use both at the same time?
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.
Do these work in my Toyota or Lexus?
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.
Where can I buy Upper Cylinder Lubricant Corrosion Inhibitor?
Online from AMSOIL through Tuned Yota, an Independent Authorized AMSOIL Dealer in Lakeville, Minnesota: every "Buy" link on this site opens the product on amsoil.com, and the order ships from AMSOIL. Preferred Customer pricing is available only by registering as an AMSOIL Preferred Customer. You can also call (612) 406-7117 or email info@tunedyota.com to order through us.