Can Fuel Stabilizers Be Mixed with Old Fuel?

Mixing Guidelines

When mixing fuel stabilizers with old fuel, it’s essential to follow the manufacturer’s instructions for the correct ratio. Typically, fuel stabilizers are added at a 1:10 to 1:20 ratio (1 part stabilizer to 10 or 20 parts fuel). For example, if you have 5 gallons of old fuel, you would add 1/5 to 1/10 gallon of fuel stabilizer. Exceeding this ratio can lead to a fuel that’s too thick and difficult to burn.

Effects on Fuel Performance

Adding fuel stabilizers to old fuel will help prevent the breakdown of the fuel’s components, which can lead to varnish formation, gum, and sediment buildup in the engine or generator. This can reduce engine performance, increase maintenance costs, and potentially cause engine failure. By stabilizing the fuel, you can extend the shelf life of the fuel and maintain its performance.

Precautions and Considerations

When mixing fuel stabilizers with old fuel, make sure to follow the manufacturer’s instructions and take necessary safety precautions. Wear protective gear, work in a well-ventilated area, and avoid mixing fuel stabilizers with other chemicals or additives. Also, be aware that fuel stabilizers may not completely restore old fuel to its original condition, so it’s always best to use fresh fuel whenever possible.