AMSOIL Fuel Additives for Gasoline and Diesel Engines
Start with the problem you are trying to solve: injector deposits, stale fuel, cold-weather diesel operation or off-road octane needs. Then choose the AMSOIL additive that fits.
Find the Right Additive
Start with what the vehicle or equipment needs. These six common situations will point you toward the AMSOIL treatment that makes the most sense.
Clean Gasoline Deposits
AMSOIL P.i. Performance Improver
A concentrated treatment for cleaning deposits from gasoline injectors, valves and combustion chambers.
Maintain Cleanliness and Lubricity
AMSOIL Upper Cylinder Lubricant
An every-tank treatment designed to support injector cleanliness, upper-cylinder lubricity and corrosion protection.
Protect Stored Gasoline
AMSOIL Gasoline Stabilizer
For vehicles and equipment that sit between uses, helping protect fuel against deterioration, gum and varnish.
Treat Diesel Fuel Year-Round
AMSOIL Diesel 4-IN-1 Fuel Additive
An all-season treatment combining detergency, lubricity support, cetane improvement and better cold-flow performance.
Prepare for Cold Weather
AMSOIL Diesel Cold Flow
Helps diesel fuel remain operable in low temperatures and reduces the risk of wax crystals clogging the fuel filter.
OFF-ROAD & RACING ONLYIncrease Octane for Racing
AMSOIL DOMINATOR Octane Boost
A concentrated octane treatment for off-road and racing applications where additional knock resistance is needed.
AMSOIL Gasoline Additives for Fuel-System Cleaning, Storage & Octane Boost
Compare AMSOIL P.i., Upper Cylinder Lubricant, Quickshot, Gasoline Stabilizer and octane boosters for daily drivers, stored vehicles, powersports and racing applications.
Deep-Clean First. Maintain After.
Use P.i. as the concentrated cleanup treatment, then use Upper Cylinder Lubricant for recurring maintenance between deep-clean treatments.
P.i. Performance Improver
Concentrated treatment for removing accumulated deposits from gasoline injectors, valves and combustion chambers. AMSOIL recommends treatment every 4,000 miles.
Upper Cylinder Lubricant
Every-tank maintenance treatment that helps lubricate upper cylinders, maintain injector cleanliness and fight ethanol-related corrosion.
Specialty Gasoline Treatments
Use these products when storage, powersports, motorcycle or racing requirements call for something more specific.
Quickshot
Helps clean fuel-system deposits and address gasoline, ethanol and storage issues in powersports equipment and small engines.
Gasoline Stabilizer
For vehicles and equipment that sit between uses, helping keep gasoline fresh and protect against gum and varnish.
DOMINATOR Octane Boost
A concentrated racing treatment designed to raise octane and help reduce knock in off-road and racing applications.
Motorcycle Octane Boost
Motorcycle-specific treatment designed to increase octane and help reduce low-rpm ping or knock.
AMSOIL Diesel Fuel Additives for Injector Cleaning, Cetane & Cold Weather
Compare all-season and targeted AMSOIL treatments for dirty injectors, low cetane, reduced lubricity, cold-weather gelling and emergency fuel recovery.
AMSOIL Diesel 4-IN-1 Fuel Additive
A practical starting point when you want injector detergency, improved lubricity, higher cetane and cold-flow support in one treatment.
Choose the Diesel Treatment for the Problem
Choose a targeted treatment when you need concentrated injector cleaning, additional cetane, cold-weather protection, or emergency fuel recovery.
Diesel Injector Clean
Concentrated treatment that cleans dirty injectors, lubricates pumps and injectors and helps restore diesel power and torque.
Diesel Cetane Boost
Raises diesel cetane to improve ignition quality, starting, idle quality and available engine performance.
Injector Clean + Cetane Boost
Combines injector detergency, lubricity support and higher cetane in one convenient warm-weather treatment.
Diesel Cold Flow
Preventive cold-weather treatment that improves diesel-fuel flow and helps keep wax crystals from plugging the fuel filter.
Diesel Recovery
Emergency treatment designed to dissolve gelled diesel fuel and thaw frozen fuel filters when preventive treatment is already too late.
Cold Flow Prevents. Diesel Recovery Rescues.
Add Diesel Cold Flow before wax crystals form. If the fuel has already gelled or the filter has frozen, use Diesel Recovery as the emergency treatment.