In fact, the more Sea Foam you add to fuel, the better it cleans! Pour Sea Foam in your fuel tank to clean and lubricate your entire fuel system. It works through fuel injectors and carburetors to remove harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas.

We'll pour in the gasoline. And we'll get this test.

Directly into the combustion. Environment in a matter of minutes or when we clean diesel injectors we're filling the fuel filter with pure seafoam. So the diesel engine is actually running on seafoam.

If the engine does not run, crank engine or use primer to deliver new treated fuel into the carburetor, then allow Sea Foam to saturate and soak the bowl and jets for 24 hours. If the engine starts and runs, Sea Foam will work to dissolve residues as the treated fuel is drawn through the carburetor.

IC5 is formulated just to clean fuel injectors in gasoline engines. It's a different formula than Sea Foam Motor Treatment. Sea Foam Motor Treatment cleans the entire fuel system (fuel injectors, passageways, chamber deposits – anywhere fuel reaches in an engine). It's for both gas and diesel engines.

Top-rated Fuel Injector Cleaners

• Chevron Techron Concentrate Plus Fuel System Cleaner.
• Lucas Oil Upper Cylinder Treatment with Injector Cleaners.
• Sea Foam IC5 Concentrated Fuel Injector Cleaner.
• STP Direct Injection.
• Royal Purple Max Atomizer Fuel Injector Cleaner.
• Gumout High Mileage Fuel Injector Cleaner.

Top-rated Fuel Injector Cleaners

• Chevron Techron Concentrate Plus Fuel System Cleaner.
• Lucas Oil Upper Cylinder Treatment with Injector Cleaners.
• Sea Foam IC5 Concentrated Fuel Injector Cleaner.
• STP Direct Injection.
• Royal Purple Max Atomizer Fuel Injector Cleaner.
• Gumout High Mileage Fuel Injector Cleaner.

For cleaning a gasoline or diesel fuel system, it's safe to add more Sea Foam to fuel. In fact, the more Sea Foam you add to fuel, the better it cleans! Pour Sea Foam in your fuel tank to clean and lubricate your entire fuel system.

Edit: Yes you can add the entire bottle safely. The more concentrated the better. A whole can to half a tank is fine. i usually wait till 1/4 - 1/8 tank then dump in the whole can of seafoam.

And let it idle for two minutes. At this point the engine is actually running on straight seafoam. After running for two minutes turn off the engine to allow the Sea Foam to hot soak the injectors.

Sea Foam is made from 100% safe cleaning and lubricating ingredients. It can't harm engine parts or components, no matter how long they're in contact with Sea Foam.

• Chevron. Chevron Techron Concentrate Plus Complete Fuel System Cleaner. Best fuel injector cleaner overall.
• Lucas. Lucas Upper Cylinder Lubricant and Injector Cleaner.
• Gumout. Gumout Regane High Mileage Fuel System Cleaner.
• Royal Purple. Royal Purple Max Atomizer Fuel Injector Cleaner.
• AMSOIL. Amsoil P.i. Performance Improver.