Fuel Additive Ratio Calculator
Pick your AMSOIL fuel additive and how much fuel you’re treating, and we’ll tell you exactly how many ounces to add. Treat ratios are AMSOIL’s published specs — application matters, so always check the bottle for your specific product.
Common AMSOIL Fuel Additive Ratios
| Product | Application | Treat Ratio |
|---|
Treat ratios shown are AMSOIL’s published recommendations, provided for reference only. Some are initial/max treatment amounts — always check the bottle for your specific product.
Frequently Asked Questions
How much fuel additive is needed per gallon?
It varies by product — always check the bottle. For many AMSOIL additives, 1 oz. treats roughly 2.5 gallons of fuel, but the calculator above will give you the exact number for your product.
Is it worth adding fuel additives to a vehicle’s fuel system?
Yeah, especially if you’re dealing with lower-quality fuel or want extra protection. AMSOIL’s fuel additives are tested to fight corrosion, improve lubricity, and boost performance — P.i. alone has shown up to 14% restored horsepower in third-party testing.
Which additive is right for my vehicle?
Depends on what you’re running and what you’re trying to fix or prevent. Text SPEC to (651) 300-2010 and we’ll help you pick the right one.
Get Started
Text SPEC to (651) 300-2010, or set up a Preferred Customer account for $20/year and start saving on every order.