• ACDelco Fuel System Treatment Plus Primary Image


  • Removes deposits from port fuel injectors to keep injectors functioning properly, helping with fuel flow
  • Cleans intake valve deposits to help eliminate starting issues for maximum drivability
  • Cleans combustion chambers to assist in eliminating engine knocking, pinging, and run-on in older vehicles, and loss of power and acceleration in knock-sensor equipped vehicles
  • Coats all metallic surfaces, helping to protect the entire fuel system


ACDelco Diesel Exhaust Fluid
ACDelco Diesel Exhaust Fluid Nozzle
ACDelco Dexos1 Full Synthetic Motor Oil
ACDelco Vehicle Maintenance

ACDelco Fuel System Treatment Plus cleans the entire fuel system and restores lost power and performance caused by carbon deposit build-up. It can be used in passenger cars and light duty trucks with gasoline engines. This fuel system cleaner helps clean sulfur corrosion and helps provide a real defense against harmful sulfur contamination in the fuel. Regular use of this treatment may also help prevent fuel gauge malfunction caused by the sulfur components that are found in some gasolines. One ounce of this product will treat one gallon of fuel.


Should I clean my fuel system regularly?
No, the fuel system should be cleaned whenever the engine appears to be running poorly such as difficult starts, rough idle or poor acceleration.


Can using a low octane/cetane fuel cause significant problems with my fuel system components?
Yes, low octane or cetane fuel can cause engine knock which can damage the engine. Fuel with a minimum amount of detergents and additives can also lead to harmful injector and engine deposits causing difficult starts, poor acceleration


Is do-it-yourself fuel system cleaning enough to keep my vehicle running smoothly?
Yes, fuel system cleaning may help reduce or eliminate many causes of fuel system problems. If problems persist after a second system cleaning the problem is more serious and further investigation will be required.


Should I take my vehicle to a technician regularly for a professional fuel system cleaning?
Not necessarily, but if ACDelco Fuel System Treatment Plus does not correct the problem after two treatments other types of cleaning or tuning will be required.


Are there symptoms I can look for that show my vehicle might need a fuel system cleaning?
Yes, difficulty starting, rough idling, poor acceleration and poor gas mileage are all signs the fuel system may need cleaning.


Are there other products that are necessary to use before/after/along with these fuel system cleaners?
No, each of these cleaners can be used independently or in combination with each other to maximize system cleaning. Under most circumstances these products do not require any other product prior to or with any other product. If symptoms continue, further diagnostics or repairs may be needed.


• 1 oz. of this product treats 1 gallon of fuel. Add the number of ounces of fluid equal to the capacity in gallons for the fuel tank and then fill the tank. More than one bottle may be necessary to properly treat some vehicles. Minor over-treatment (up to 10%) will have no adverse effects on the engine. Repeat every time the oil is changed.


• The goal of proper fuel system maintenance is to keep the system clean and help ensure the most economical and efficient fuel system life.


• Some of the ways contaminants can be kept out of the system from the onset are by keeping fuel system components, especially fuel transfer equipment like nozzles, tanks, and hoses, free from surface dirt and out of the rain.


• Performing regular fuel system cleaning and maintenance helps remove fuel varnish build-up, intake valve deposits, and cylinder head deposits.


• One of the major goals of fuel system cleaning and maintenance is to maximize fuel economy, which is a huge concern with today’s fuel prices. In order to maximize fuel economy and avoid significant, costly fuel system repairs, you should regularly check the tire pressure, stay vigilant with engine tune-ups, regularly check tire wear for signs of poor wheel alignment, and run air conditioning only when necessary. You should also change the oil as required, regularly check cooling system operation, check for dragging brakes, avoid excessive idling, drive at the speed limit, and accelerate moderately from a stop.




ACDelco Lubricants
ACDelco Mechanical Repair
ACDelco Supplies
ACDelco Emissions

Search Parts Cataloge
Locate Service Center
Locate Parts Store