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Should I Use Stabilizer for Fuels in My Generator?

April 5, 2026

Quick Answer

Yes, using a stabilizer for fuels in your generator is highly recommended, especially if you plan to store fuel for extended periods. This will help prevent phase separation and maintain fuel quality, ensuring your generator runs efficiently and effectively. Regular fuel maintenance is crucial.

Fuel Stabilization Basics

Stabilizers are additives that prevent fuel breakdown and separation in gasoline and diesel engines. In a generator, fuel degradation occurs due to exposure to temperature fluctuations, moisture, and oxygen. Without a stabilizer, fuel can separate into different components, leading to clogged fuel lines, filters, and engine problems.

Choosing the Right Stabilizer

When selecting a fuel stabilizer for your generator, look for products specifically designed for gasoline or diesel engines, depending on your generator’s fuel type. A good stabilizer should have a shelf life of at least 18 months and be compatible with your generator’s fuel. For example, a popular choice is STA-BIL, which is available in various concentrations (33.8 ounces, 64.5 ounces, 128.5 ounces) and suitable for both gasoline and diesel engines.

Proper Stabilizer Use

To use a fuel stabilizer effectively, follow the manufacturer’s instructions for the recommended dosage. Typically, you’ll need to add the stabilizer to a full tank of fuel and then mix it thoroughly before use. It’s essential to store your generator in a well-ventilated area to prevent the buildup of fumes and to keep the fuel at a consistent temperature.

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