Skip to Main Content
Shop by Vehicle
Roll over image to zoom in

AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor

Product code : UCLCNC-EA

Preserves Horsepower and Performance

Your engine’s top-end is sparsely lubricated and prone to the development of performance-robbing deposits. It’s also highly susceptible to corrosion, an issue compounded by the prevalence of ethanol in today’s fuel. AMSOIL Upper Cylinder Lubricant is designed to solve those issues. Its AMSOIL-exclusive, powerful formulation helps maximize engine power and performance while increasing engine life. And unlike competing fuel additives, AMSOIL Upper Cylinder Lubricant works.

AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor



Lubricates Top-End Components
The intense heat of combustion and limitations of the oil-control piston ring result in a lack of oil at the top of each cylinder. AMSOIL Upper Cylinder Lubricant's unique additives provide that missing lubrication to fight piston-ring and cylinder wear, maximizing engine compression and horsepower. Its lubricity improvers also aid in protecting fuel injectors and other fuel-system components from wear, helping ensure excellent performance and long-life. AMSOIL Upper Cylinder Lubricant delivers 18 percent more lubricity than Lucas* and 20 percent more than Sea Foam* for better retention of horsepower and fuel economy (see chart below).1

Lubricity Performance Graph

Inhibits Corrosion
Upper Cylinder Lubricant uses potent corrosion inhibitors to coat metal surfaces, block out moisture and stop deterioration before it starts. This is particularly important when using gasoline that contains ethanol due to its propensity to attract water and hasten corrosion. Inhibiting corrosion maximizes component life and reduces wear in the engine's top-end to guard against compression loss and maintain optimum power.

  • Lubricates fuel system and upper cylinders
  • Fights ethanol-related corrosion
  • Helps keep injectors clean
  • Compatible with capless fuel systems

Keeps Injectors Clean
Upper Cylinder Lubricant contains detergent additives designed to maintain injector cleanliness. While AMSOIL P.i. Performance Improver is designed to attack and remove stubborn injector deposits that can reduce power and fuel economy, Upper Cylinder Lubricant helps preserve injector and combustion-chamber cleanliness. Using it with every tank of fuel helps retain fuel-economy and performance gains and maximizes component life.

Capless-Compatible Packaging
Many new vehicles have replaced traditional fuel caps with capless systems. The threads on most bottles restrict them from opening the flap inside the fuel neck and make removing the bottle difficult. The AMSOIL Upper Cylinder Lubricant bottle is fully compatible with capless fuel systems. It's easy to insert, pour and remove the bottle.

RECOMMENDATIONS

  • For use with cars and trucks.
  • For best results, use with every tank of fuel. Do not refill tank until almost empty.
  • Treats up to 25 gallons. Add entire bottle to tank at fill-up.
  • Treat large gas tanks with two bottles of Upper Cylinder Lubricant. Using more than two bottles is not recommended.
  • Safe for use with catalytic converters, oxygenated gas and up to 15 percent ethanol-blended fuels. Do not use with E85 fuel.
  • Do not use with two-stroke or diesel engines.

AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information visit www.amsoil.ca/warranty/.

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available at www.amsoil.ca or upon request at (715) 392-7101. Keep Out of Reach of Children.



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 the ASTM D6079 modified for use with gasoline. *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor

SDS

Data Bulletin

Data Bulletins (English)


AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor

  • 5 star rating
    Supercharge 2016 Tundra 5.7 V8 4x4
    By  DUANE,  a  Verified Buyer  from  Oklahoma  on  December 23, 2023
    I have used Amsoil for many years/ A number of friends have been change over to Amsoil. This is my personally thought on the product. I have raced work for my dad in his station starting back in the 60s. so in closing If you are not using Amsoil you are using second best.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Upper cylinder lube
    By  JOEL,  a  Verified Buyer  from  Cloverdale, Indiana   on  December 23, 2023
    Have used this upper cylinder lube for years now on a regular bases and both vehicles have ran awesome on it. Smooth Running on injection systems for sure. Would highly recommend to anyone looking to clean up a dirty fuel system.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Lubricant
    By  JAY,  a  Verified Buyer  on  December 14, 2023
    Great product
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Better Gas Mileage
    By  NICK,  a  Verified Buyer  from  Greeley,CO  on  December 13, 2023
    Notice I get better fuel mileage. Use my Subaru for package deliveries and I can see the difference in the bank account, less on gas!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    My favorite gasoline shot
    By  Nathanael,  a  Verified Buyer  from  New Jersey  on  December 04, 2023
    I use this product frequently, it gives me peace of mind that the upper components of my cylinder head are lubricated giving longer life to the engine in the long run.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Keeps GT Mustang running smooth
    By  JAMES R,  a  Verified Buyer  on  December 02, 2023
    When not using performance improver PI I use this in every tank in between
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Outstanding Upper Cylinder Cleaner
    By  RICH,  a  Verified Buyer  on  December 01, 2023
    Once again I find Amsoil to be superior. I have used this consecutively for five months and found that my valves were way cleaner after use, than prior to using this product. If I can see what five months has done, imagine a year of using this product and how it would keep them clean. Thank you Amsoil. I would seriously recommend using this as a preventive measure monthly.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 3 star rating
    Mediocre Review after Using Multiple Times
    By  CURTIS,  a  Verified Buyer  from  Weatherford, Tx  on  November 29, 2023
    This product I guess is okay. After using in multiple vehicles over the course of several years, do not notice any significant improvement in smoothness of engines or improved fuel economy or performance
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    UC CLEARLY NOW?
    By  BENJAMIN the man the myth the legend ,  a  Verified Buyer  from  Walla Walla Washington   on  November 27, 2023
    Upper Cylinder cleaner, lubricant and performance booster will clean up your dirty valves and make your ride purr like a kitten!!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Additives
    By  Tracy,  a  Verified Buyer  from  Wyoming  on  November 25, 2023
    I notice a difference in my upper cylinders. There seem to be working a lot better not harder nice products
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?