Skip to Main Content
Close Icon

Main Menu

Begin typing to search, use arrow keys to navigate, Enter to select.
Your order may take longer than normal to arrive, and some products may be unavailable. We are working hard to overcome supply-chain issues and freight-carrier delays. Learn more.

Upper Cylinder Lubricant

Product code : UCLCN-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.
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.

Upper Cylinder Lubricant



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.com/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.com 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.

Upper Cylinder Lubricant



Upper Cylinder Lubricant

  • 5 star rating
    Best of the Upper Cylinder Lubricants
    By  TIM,  a  Verified Buyer  from  SC  on  May 09, 2022
    Failed to verify captcha
    This the second time I've been asked to review. I have used this for about two years in a 3.5 Duratec engine. One of the benefits of this products has been a .3 mile per gallon increase mileage outside of other stated benefits. Mileage drops .3 to .5 miles per gallon when not added at fill ups. My wife drives this vehicle which I feel up, so its not me increasing the mileage. It doesn't leave any noticeable residue on the end of the tail pipes (unlike another brand I've used in my pick up truck). My intention for using this product is to increase the life of this engine and its efficiency. So far it its working as intended.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    This is extra. not really a "must buy"
    By  CVNT5,  a  Verified Buyer  from  Oregon   on  May 01, 2022
    Failed to verify captcha
    i just buy this to tune up my vehicle and get the most out of it.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Improve your car's diet
    By  NICHOLAS,  a  Verified Buyer  from  Brooklyn   on  April 26, 2022
    Failed to verify captcha
    Use this in all my cars at fill to keep injectors cleaner and run smoother. I also like the lubrication benefit for the upper cylinders.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Luv this additive
    By  WILLIAM,  a  Verified Buyer  from  Nj   on  April 25, 2022
    Failed to verify captcha
    I notice an increase in milage in my 2021 4cyl Silverado of 2mpg
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 3 star rating
    Upper cylinder Lubricant Review
    By  JIM,  a  Verified Buyer  from  California  on  April 25, 2022
    Failed to verify captcha
    Have not been able to detect any improvement. Possibly changes are so minimal that it is hard to notice a change. I am not saying that the product is defective but might need some test equipment to pick up a low-lying improvement.
    Was this review helpful?
  • 5 star rating
    Upper cylinder lubricant
    By  JERRY,  a  Verified Buyer  on  April 19, 2022
    Failed to verify captcha
    Purchased this for my wife and daughters cars both noticed an improvement right away in both smoothness of the engine and a mpg.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Upper Cylinder Lubricant
    By  MICHELLE,  a  Verified Buyer  on  April 19, 2022
    Failed to verify captcha
    Thanks for creating such great products!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Clean intake
    By  DAVE,  a  Verified Buyer  from  New York  on  April 17, 2022
    Failed to verify captcha
    Excellent product made to clean & lubricate your fuel system..
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Works well, keep using it
    By  KEVIN,  a  Verified Buyer  from  Lebanon, NH  on  April 17, 2022
    Failed to verify captcha
    Driving a 19 year old car and with gas prices as they are, you need to get as much mileage you can out of a gallon of gas, car runs better, more engine power too.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Upper cylinder lubricant
    By  RANDY,  a  Verified Buyer  from  McCalla, Alabama   on  April 16, 2022
    Failed to verify captcha
    This upper cylinder lubricant keeps our 2021 Lexus NX300 running smooth as silk we use every other tank full it fights the moisture in todays gasoline and keeps injectors clean plus it helps keep the cylinders clean along with using Amsoil 0w20 XL motor oil I’m a big fan of Amsoil I won’t use anything else u might pay just a little bit more, but a little more now is better than a rebuilt or new engine later folks do your homework check out Amsoil u will be glad u did
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?