Choose a gasoline fuel injector cleaner by engine type, the amount of fuel in the tank and the directions on the exact bottle. For gasoline fuel injection, Sea Foam IC5 is labeled for up to 25 US gallons per bottle, while Gumout High Mileage calls for up to 21 US gallons. Check the owner’s manual first, and diagnose a persistent misfire or warning light before spending money on an additive.
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Gasoline fuel injector cleaner labels and doses
| Product | Verified label details | Use and limits |
|---|---|---|
| Gumout High Mileage Fuel Injector Cleaner | 510013, 6 fl oz per bottle | One bottle treats up to 21 US gal of gasoline. |
| Sea Foam IC5 Fuel Injector Cleaner | 5.25 fl oz per bottle | One bottle for up to 25 US gal in gasoline fuel-injected engines. |
| LIQUI MOLY Jectron 2007 | 300 mL | One can for 25–75 L of gasoline, roughly 7–20 US gal. |
| Red Line SI-1 Complete Fuel System Cleaner | 60103, 15 fl oz | The maker’s initial-treatment directions specify one bottle for up to 20 US gal of gasoline. |
| Royal Purple Max-Clean 11722 | 20 fl oz per can | Current product page specifies gasoline and one can for up to 20 US gal. |
- Gumout High Mileage Fuel Injector Cleaner Check Amazon availability
- Sea Foam IC5 Fuel Injector Cleaner Check Amazon availability
- LIQUI MOLY Jectron 2007 Check Amazon availability
- Red Line SI-1 Complete Fuel System Cleaner Check Amazon availability
- Royal Purple Max-Clean 11722 Check Amazon availability
Check the fuel system and the dose
- Read the owner’s manual for your engine. Check whether the manufacturer allows an additive, then match the exact bottle to the fuel and engine type.
- Read how many gallons or liters the label treats. Use the stated amount, tank fill order and any special capless-filler instructions. A multi-bottle pack can contain several treatments.
- Add the product to the fuel tank as directed. Use a ventilated area, keep it away from ignition sources, and follow the label and safety data sheet for protective equipment and storage.
What an in-tank cleaner can reach
Fuel passes the back of the intake valve on a port-injected engine. In a direct-only injection engine, fuel enters the cylinder downstream of the valve. A cleaner mixed into the tank therefore does not wash the back of those intake valves. The Gumout fuel-system explanation illustrates the difference.
Persistent rough running, a warning light or a fuel-pressure fault calls for diagnosis. A mechanic can check ignition, fuel delivery and related faults before deciding whether injector cleaning is appropriate. See the spark plug guide for ignition-side maintenance. For storage, octane or diesel use, start with the fuel additives guide or the diesel fuel additives guide. Diesel crankcase lubrication is covered in the diesel engine oil guide.
Gumout High Mileage Fuel Injector Cleaner
The Gumout directions say to add the bottle to a nearly empty gasoline tank and then refuel within the stated limit. The linked multipack contains individual 6-fl-oz bottles. Dose from the individual bottle and fuel volume. See the multipack listing for package details.
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make your decision.
Sea Foam IC5 Fuel Injector Cleaner
The IC5 directions identify gasoline fuel-injection systems and say the bottle works with capless tanks. Check the IC5 label even if you have previously used Sea Foam Motor Treatment, which is a different product.
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make your decision.
LIQUI MOLY Jectron 2007
LIQUI MOLY lists gasoline injection and carbureted applications. Check the vehicle fuel system and the delivered label. On a direct-only injection engine, an in-tank cleaner travels with the fuel into the combustion chamber.
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make your decision.
Red Line SI-1 Complete Fuel System Cleaner
The Red Line technical sheet specifies the full bottle for the initial treatment. Check the current bottle for the fuel grade, dose and directions before adding it.
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make your decision.
Royal Purple Max-Clean 11722
The current Royal Purple page specifies gasoline. An older technical sheet lists gasoline and diesel. Follow the directions supplied with the exact can and confirm diesel suitability with the manufacturer before use.
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make your decision.
FAQ
How much fuel does one bottle treat?
It depends on the label. The Gumout 510013 bottle treats up to 21 US gallons, and one Sea Foam IC5 bottle treats up to 25 US gallons. Check your bottle and measure the dose for your tank.
Can an in-tank cleaner wash intake valves on a GDI engine?
In a direct-only injection engine, gasoline enters the cylinder downstream of the intake valves. A cleaner mixed with the gasoline does not wash the backs of those valves.
Should I use a gasoline injector cleaner in diesel fuel?
Use a product only with the fuel and engine type shown on its exact label and allowed in the owner’s manual. Choose a diesel-labeled product for a diesel application.
Can injector cleaner fix a persistent misfire?
A misfire can come from ignition, fuel delivery or other engine faults. Diagnose a persistent misfire or warning light before trying an additive.
When do I pour the cleaner into the tank?
Follow the exact bottle. Gumout 510013 says to add it to a nearly empty tank and then refuel. Other formulations can use different directions.
Product photos and listings
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make your decision.
| Product | Image and listing |
|---|---|
| Gumout High Mileage Fuel Injector Cleaner | Check Amazon availability |
| Sea Foam IC5 Fuel Injector Cleaner | Check Amazon availability |
| LIQUI MOLY Jectron 2007 | Check Amazon availability |
| Red Line SI-1 Complete Fuel System Cleaner | Check Amazon availability |
| Royal Purple Max-Clean 11722 | Check Amazon availability |
Sources checked on November 11, 2026.
