MotorKote UCL Upper Cylinder Lubricant with Fuel Injector Cleaner 64 oz

Regular price $26.99 Sale price $22.00 Save $4.99
-989 in stock

MOTORKOTE Upper Cylinder was formulated to bring additional upper cylinder lubrication and to clean fuel injectors and prevent deposits from forming. 

Compatible in both fuel and diesel engines and more concentrated fuel cleaning capability than the brand leader.


  • Increases Horsepower

  • Removes Valve Stem Gum

  • Reduces carbon build up the cause of: Pre-ignition, power loss, burned valves, broken rings

  • Restores Power and engine performance

  • Increases fuel efficiency

  • Cleans injectors to Reduce: Power loss, hesitations, pinging/dieseling, loss of fuel economy

 MOTORKOTE Upper Cylinder Lubricant & Fuel Injector Cleaner,  is safe for use in all catalytic converters, carburetors, and fuel injection systems and will not void warranties.


Add full 5 ounces to 25 Gallon Fuel Tank every fill-up, maintain the ratio of 1 ounce per 5 Gal of fuel (Gas or Diesel).

Can be used with MotorKote Fuel Optimizer or MotorKote Low Sulfur Lube in Diesel engines, alternate products between fill-ups.


Proposition 65 Warning for California Consumers:

⚠️WARNING: This product can expose you to chemicals including Cumene, which is known to the State of California to cause cancer. For more information go to

Customer Reviews
4.8 Based on 18 Reviews
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John W. Holcombe
United States United States
I recommend this product
MotorKote UCL Upper Cylinder Lubricant

This is about my fourth bottle (maybe more) of your product. I have used it in my 20-year-old Pontiac Montana with 175,000 miles. Runs great. Gets 25MPG and does not burn any oil during 7000-mile change intervales. Also used in my 2011 GMC Sierra with the engine that runs on 8 or 4 cyl. as needed. I understand they have reliability issues. I add 2 oz. to every 10+ gallon fill-up for both vehicles. The truck gets 17.2MPG and uses no oil between 7000-mile changes.

Howard A.
United States United States
I recommend this product
Engine was surging at idle

Added UCL for a single tank, halfway through a tank of gas engine smoothed out. This is my first experience with UCL will do update as I gain more time with Upper Cylinder Lubricant. Have been using Hyper Lubricant for about five years because it has proven to be beneficial wanted to try other Motorkote products.

John V.
United States United States
I recommend this product

I start using motorkote products when my pickup had 30,000 miles it now has 169,800 miles and run's like new..

Gregory R.
United States United States
I recommend this product
Mk upper lub

Great used in the past had good results

Tony W.
United States United States
I recommend this product
will use again

first time using the U C L but i am very pleased