AMSOIL Fuel Additives
Fuel additives can solve very different problems, so the right product depends on the fuel and the goal. AMSOIL offers gasoline and diesel additives for injector cleanliness, fuel-system maintenance, diesel lubricity, cetane support, cold-weather operability and storage.

Why we like the AMSOIL fuel-additive lineup
Instead of selling one universal additive for every problem, AMSOIL offers products aimed at specific needs. That makes it easier to choose a product for injector cleaning, diesel performance, cold-weather operation or storage rather than adding chemicals without a clear purpose.
A clean fuel system can help maintain proper injector spray patterns and combustion quality. Diesel owners may also care about lubricity, cetane and winter operability. The product label and treat rate matter, so follow the instructions for the exact additive.
Diesel Engine Oil
Pair fuel-system care with the correct diesel lubricant.
Diesel Trucks
A complete diesel pickup maintenance guide.
RVs
Fuel and drivetrain products for motorhomes and tow vehicles.
Marine
Fuel-system and lubrication guidance for boats and outboards.
Diesel and gasoline products are different
Gasoline and diesel fuel systems have different needs. Never assume a product designed for one fuel can be used in the other. AMSOIL identifies the fuel type and purpose for each additive.
Treat rate matters
More is not automatically better. Use the amount specified for the container size and fuel volume. For seasonal equipment, pay attention to storage directions and how long the fuel will sit.
Common questions
Which AMSOIL fuel additive should I use?
First identify gasoline or diesel, then the goal: cleaning, lubricity, cetane, cold-weather performance or storage. Choose the product made for that purpose.
Can I overdose a fuel additive for better results?
Do not assume more is better. Follow AMSOIL’s published treat rate for the specific product.
Are diesel fuel additives useful in winter?
AMSOIL offers diesel products specifically intended for cold-weather fuel operability. Use the correct seasonal product and follow label directions.