Ferox is a solid-state fuel catalyst that dissolves and disperses throughout your fuel. During combustion, it is designed to help the fuel burn more consistently and completely, supporting smoother performance and reducing byproducts associated with incomplete combustion.

Ferox is different from conventional liquid treatments. Many treatments focus on cleaning deposits, changing fuel properties, or addressing problems after they develop. Ferox is a solid catalyst designed to work during combustion—where fuel is converted into usable energy.

Yes. The same Ferox catalyst technology can be used in gasoline and diesel applications. The different pack colors represent treatment capacity, not fuel compatibility.

Ferox is also used in propane, LPG, natural gas, and other fuel applications. Always select the correct dosage for the amount of fuel being treated.

The primary difference is how much fuel each tab treats:

Ferox Red: up to 8 gallons per tab

Ferox Blue: up to 20 gallons per tab

Ferox Green: up to 50 gallons per tab

The Sample Pack includes four tabs, with each tab treating up to 20 gallons.

Drop the correct Ferox tab into your tank before filling up, then add fuel normally. Filling the tank helps the dissolved catalyst disperse throughout the fuel. There is no measuring, pouring, or mixing required.

Ferox is designed for consistent use. Add the correct dosage when treating a new tank of fuel. Using it consistently makes it easier to evaluate changes from one tank to the next.

Some drivers notice changes in engine smoothness, starts, idle quality, or throttle response during the first tank. Mileage and longer-term changes are easier to evaluate across multiple fill-ups.

For the clearest comparison, use Ferox for two complete tanks while keeping your fuel, route, maintenance, load, and driving habits as consistent as possible.

Ferox is designed to support more complete combustion, which can help an engine use fuel more effectively. However, mileage results vary based on vehicle condition, fuel quality, weather, route, load, idle time, maintenance, and driving habits.

Track your baseline and compare results across multiple tanks rather than relying only on the dashboard's immediate estimate.

When used as directed, Ferox is formulated for use in modern gasoline and diesel engines, including vehicles equipped with catalytic converters, oxygen sensors, diesel particulate filters, and other emissions equipment.

For the clearest test, use Ferox by itself and avoid changing multiple additives or maintenance variables at the same time.

Use the appropriate number of tabs based on total fuel capacity. Ferox Green treats up to 50 gallons per tab. For example, a 100-gallon treatment requires two Green tabs.

For commercial tanks, fleets, or unusual applications, contact Ferox for dosing assistance.

Use Ferox for two complete tanks and compare how your vehicle starts, idles, accelerates, and performs. If you do not notice a difference in how your engine runs, your purchase is covered by the Ferox two-tank money-back guarantee, subject to the guarantee terms.