Fuel Additives by STP® | Gas treatment and fuel injector cleaning products
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FUEL ADDITIVES

Want to maximize fuel efficiency and avoid problems such as rough idling, weak acceleration, stumbling and stalling? STP® fuel additive products can help. Our redesigned fuel additive bottles are compatible with cap-less fuel tanks.

Not sure which FUEL ADDITIVES to use?

Click below to view our comparison chart

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STP® Ultra 5 in 1 Fuel System Cleaner
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STP® Complete Fuel System Cleaner
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STP® High Mileage Complete Fuel System Cleaner
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STP® Super Concentrated Fuel Injector Cleaner
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STP® High Mileage Fuel Injector & Carburetor Treatment
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STP® Gas Treatment
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STP® Octane Booster
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STP® Racing Series Octane Booster
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STP® ULTRA 5-in-1 PLUS Fuel System Cleaner + Fuel Stabilizer

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STP® Direct Injection Fuel Injector Cleaner
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STP® Emissions Reducer + Fuel System Cleaner
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STP® Ethanol Fuel System Treatment with Fuel Stabilizers
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STP® Diesel Fuel Injector Treatment
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STP® Super Concentrated High Mileage Fuel Injector Cleaner
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STP® Super Concentrated Gas Treatment
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STP® Fuel System Cleaner for Ethanol
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STP® All Season Water Remover