Ferox is a solid-state fuel catalyst tablet formulated to optimize combustion chemistry, increase engine efficiency (meaning less wear & tear, better mileage, and sharper throttle response), and reduce harmful emissions. It’s not a liquid, not a gimmick, and not an additive—it’s a catalyst, and simply a smarter way to fuel every tank.

The only difference between each pack is how much fuel each tab treats. Any of our tabs can be used in any type of fuel.

Ferox Blue - treats 20 gallons per tab, with 10 tabs in each pack

Ferox Red - treats 8 gallons per tab, with 10 tabs in each pack

Ferox Green - treats 50 gallons per tab, with 6 tabs in each pack

Ferox Sample Packs - treat 20 gallos per tab with only 4 tabs in each pack

Just drop 1 tablet into your tank before you fill up.

It dissolves instantly and treats the entire tank as you pump.

Use it every fill for the best performance and engine cleanliness.

Most users notice smoother performance, easier starts, sharper throttle response, or improved mileage within the first or second tank, with improvements compounding over time.

Use one tablet every fill-up for the best results depending on your tank size. You can under-treat so make sure you use the correct amount of tabs for the right ratio of of fuel you're treating. Performance improvements stack as your combustion improves.

Most orders ship within 24-48 hours and arrive in 3-7 business days depending on location. If you believe your package is lost, damaged, or stolen please email us at orders@feroxtabs.com with your order number.

If you’re not satisfied, you can reach out to us within 30 days of purchase and we’ll make it right. Please email orders@feroxtabs.com with your order number and questions or concerns.

Yes! You can subscribe monthly to receive your Ferox at your door every time you need it. Plus you'll get that month's sticker and possible t-shirt.