MotorKote Heavy Duty Motor Treatment

Regular price $10.99 Sale price $8.99 Save $2.00
-764 in stock

MotorKote Heavy Duty Motor Treatment is to be used in all gas, diesel, ethanol fuels, and in engine oil crankcases. 

• Cleans & removes harmful carbon deposits, gums, & varnishes

• Removes moisture from fuel & oil

• Restores lost performance

• With added fuel stability protection

100% pure petroleum product treats both gasoline & diesel engines including 2 & 4 cycle engines, carburetors, fuel injected gasoline engines, automobiles, trucks, boats / marine, tractors, motorcycles, lawn & garden machinery and industrial engines.

• Removes fuel system deposits and residues 

• Cleans fuel injectors & carburetor jets

• Stabilizes & conditions fuels - use for

• engine storage (lasts up to 2 years)

• Cures hesitations, stalls, pings & rough idle

• due to carbon buildup

• Frees sticking /noisy lifters & rings

• Cleans PCV valve system

• Increases RPM’s vacuum & compression

• Lubricates upper cylinders

• Helps de-ice fuel

• Cleans intake valves & pistons

• Removes catalytic converter odors

• EPA registered


Will not harm engine components, catalytic  converters, seals, gaskets, or oxygen sensors




Works with all types of oil: Conventional, Semi & Full Synthetics

Treats up to 10 quarts of oil - 1.5 oz. per quart 



16 oz. treats up to 25 gallons of fuel

1 oz. per gallon ( Gas & Diesel )


SMALL ENGINES - 2 & 4 Cycle Engines

1 oz. per gallon ( Gas & Oil Mix )




May be used with engine decarbonizing equipment through the vacuum system to clean intake manifold, valves and combustion chamber. Follow recommended mechanical procedures for the equipment.



Every 3,000-5,000 miles


CONTENTS HARMFUL. CONTENTS MAY CATCH FIRE. MAY IRRITATE SKIN AND EYE. Do not swallow. Do not smoke. Do not mix with other chemicals. Do not get in eyes. Do not get on skin or clothing. Do not breathe fumes. KEEP OUT OF REACH OF CHILDREN. Wear safety glasses and chemical resistant gloves. Use only in a well-ventilated area. Keep away from flames, such as a pilot light, and any object that sparks, such as an electric motor. To open-push tabs and twist left. To close-twist right until tight. FIRST AID: Contains petroleum distillates and isopropanol. If swallowed, call a doctor or Poison Control immediately (800) 222-1222. Do not induce vomiting. If in eyes, flush with water for 15 minutes, removing contact lenses (if present), after the first 5 minutes. If on skin, wash thoroughly with soap and water. If inhaled, move to fresh air. If irritation persists for any exposure, call a physician. 



Proposition 65 Warning for California Consumers: Fuel Optimizer

⚠️WARNING: This product can expose you to chemicals including Benzene, Ethylbenzene, which are known to the State of California to cause cancer and Toluene which is known to the State of California to cause birth defects or other reproductive harm. For more information go to

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5 Based on 5 Reviews
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Filter Reviews:
2/7/2020 10:40:09 PM
Rob N.
United States United States
I recommend this product

Awesome !!!

Love the mk spray been using it for years. Just getting started using the diesel fuel additive but 6.7 ford motor seems to have less turbo lag and running smoother. Awesome customer service!!

11/5/2019 9:46:34 PM
Dale N.
United States United States
I recommend this product

Good stuff

I used motorkote heavy duty motor treatment and fuel optimiser . The smoke decreased about half and fuel mileage went up about 15 percent. I think it's worth the money. The tire kore shined better on personal vehicle tire then the truck tires need to get more .

5/2/2019 4:20:44 PM
Barbara S.
United States
I recommend this product

Best thing we have used

We have used it in most of our cars, F 250 diesel and farm equipment a lot which sits during the winter. My husband really thinks it’s great he is even going to use it in my all original 78 Silver Anniversary Corvette which sets in our garage all winter.

4/23/2019 11:07:25 AM
A Customer
Dustin B.
United States

I use it in every

I use it in every thing I own an I just thing it's a great lubricant

2/24/2019 12:14:44 AM
Terry O.
United States

It's about time...

Finally someone started producing the right stuff! No engine should run without it...!