I have old product that's been sitting on a shelf for years. Is it still usable?
Most of our products are intended to be used within 1-2 years. We cannot guarantee the performance of our chemical products if older than 4 years.
I have old product that’s been sitting on a shelf for years. Is it still usable?
Most of our products are intended to be used within 1-2 years. We cannot guarantee the performance of our chemical products if older than 4 years.
Can I double the amount of additive suggested on the label?
While we recommend using our fuel additives as directed, each product has been through rigorous “no harm” testing and may be used as often as every tankful. However, a stronger concentration of the product may not provide any additional performance benefit over the recommended dosage.
Why do I have to put Gumout fuel additives into a nearly empty tank? What happens if I don't?
Using Gumout fuel additives when your tank is nearly empty facilitates better mixing with the fuel and allows you to get the most from the product chemistry due to longer use at the recommended concentration. If you use a Gumout fuel additive when your tank is full, it will just… Continue
Why do I have to put Gumout fuel additives into a nearly empty tank? What happens if I don’t?
Using Gumout fuel additives when your tank is nearly empty facilitates better mixing with the fuel and allows you to get the most from the product chemistry due to longer use at the recommended concentration. If you use a Gumout fuel additive when your tank is full, it will just… Continue
Is there a minimum number of gallons Gumout fuel additives treat?
The treatment rates vary depending on the product. All additives have directions on the back label. They may also be used in about the same proportions in smaller fuel tanks. However, any additive added to 2-cycle fuel is treating the gasoline, not replacing the oil. Add the full amount of… Continue
How often should I use Gumout fuel additives?
All Gumout fuel additives include specific directions for use. But each product has also undergone rigorous “no harm” testing and can be used as often as every fill-up. Our usage recommendations for each product are based on testing in a number of different vehicle types, though the benefits in your… Continue
Will Gumout fuel additives harm oxygen sensors, catalytic converters, hoses, fuel lines or fuel level sensors?
No. When used as directed, Gumout fuel additives will not degrade or harm oxygen sensors, catalytic converters, hoses, fuel lines or fuel level sensors.