Help & Support Center

The high alcohol level in flex fuel pulls the water into the fuel and holds it tightly. Pure alcohol and water will mix to form a clear uniform solution in ...

Probably not but in hot, humid coastal climates phase separation can begin within a week. If you are constantly driving the vehicle though, the risk is very...

No. When used as directed, Gumout fuel additives will not degrade or harm oxygen sensors, catalytic converters, hoses, fuel lines or fuel level sensors.

All Gumout fuel additives include specific directions for use. But each product has also undergone rigorous "no harm" testing and can be used as o...

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 s...

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...

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....

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.

Yes.

Gumout Multi-System Tune-Up is recommended for use in all types of engines. Other Gumout fuel additives may be used at the recommended dilution rate in the ...