A BETTER BURN STARTS IN THE TANK

YOUR FUEL CAN BURN BETTER.

Ferox is a solid fuel catalyst tab that dissolves in your tank and helps fuel burn cleaner and more completely.
Cleaner Combustion
Helps fuel burn more completely.
Smoother Response
Supports a more consistent throttle feel.
Less Soot & Buildup
Helps reduce the byproducts of incomplete combustion.
Gas + Diesel Compatible
A simple solution for every tank.
Find Your Ferox Try a Sample Pack
No tools. No messy liquids. Just drop it in and fill up.

FIND YOUR FEROX IN 20 SECONDS

Answer three quick questions and we'll match you with the right tab and purchase option.

WHAT TYPE OF FUEL ARE YOU TREATING?

Ferox works across multiple fuel types. Your treatment capacity determines the tab you need.

HOW MANY GALLONS ARE YOU TREATING AT ONE TIME?

HOW OFTEN DO YOU FILL YOUR TANK?

YOUR FEROX MATCH

Ferox colors indicate treatment capacity, but is cross-compatible with all fuel types.
Get My Ferox
Start Over
EXPLORE EVERY FEROX PACK

ONE TECHNOLOGY. FOUR WAYS TO TREAT YOUR TANK.

Every Ferox tab uses the same catalyst technology and works across multiple fuel types. How? Because Ferox does not shift any fuel properties. Simply choose your pack based on how many gallons you need to treat.
Ferox Red
SMALL TANKS

Ferox Red

$16.97
1 TAB TREATS UP TO 8 GALLONS
Best for motorcycles, ATVs, side-by-sides, lawn equipment, generators, and other small tanks.
SHOP FEROX RED
MOST POPULAR
Ferox Blue
EVERYDAY VEHICLES

Ferox Blue

$34.97
1 TAB TREATS UP TO 20 GALLONS
Best for cars, SUVs, pickups, vans, and most everyday vehicles.
SHOP FEROX BLUE
Ferox Green
LARGE TANKS

Ferox Green

$49.97
1 TAB TREATS UP TO 50 GALLONS
Best for large trucks, commercial vehicles, heavy equipment, and higher-capacity tanks.
SHOP FEROX GREEN
BEST FOR FIRST-TIME BUYERS
Ferox Sample Pack
START HERE

Ferox Sample Pack

$16.97
4 TABS — EACH TREATS UP TO 20 GALLONS
Best for first-time customers who want to test Ferox before purchasing a full pack.
TRY THE SAMPLE PACK
ALL FEROX PACKS WORK ACROSS MULTIPLE FUEL TYPES.
The pack colors indicate treatment capacity—not gasoline or diesel compatibility.
DON'T TAKE OUR WORD FOR IT

PUT FEROX TO THE TWO-TANK TEST.

The best way to understand Ferox is to experience it in the vehicle you already drive. Keep your normal routine, change one variable, and track what happens over two complete tanks.
01
RECORD YOUR BASELINE
Before adding Ferox, record your recent MPG and reset your trip computer. Note how your vehicle starts, idles, accelerates, and responds under load.
02
ADD FEROX
Drop the correct Ferox tab into your tank before filling up. Use your normal fuel and continue driving your usual routes.
03
DRIVE TWO TANKS
Use Ferox for two complete tanks. Avoid changing other additives, maintenance items, routes, or driving habits during the test.
04
COMPARE THE RESULTS
Compare your fuel economy and consider what changed behind the wheel.

WHAT TO WATCH

Average MPG and distance per tank
Cold starts and idle quality
Throttle response and acceleration
Exhaust soot or visible smoke
DEF consumption or regeneration frequency, when applicable
Overall engine smoothness and consistency
MONEY BACK GUARANTEE

TWO TANKS. YOUR VEHICLE. YOUR RESULTS.

If you don't notice a difference in how your engine runs after two complete tanks, your purchase is covered by our two-tank money-back guarantee.
START MY TWO-TANK TEST
Results vary based on vehicle condition, fuel quality, weather, route, load, maintenance, and driving habits. For the clearest comparison, change one variable at a time.
PROVEN BEYOND THE LAB

MEASURED WHERE EVERY GALLON MATTERS.

From delivery fleets and emergency vehicles to mining equipment and race teams, Ferox has been used in applications where fuel consumption, reliability, and performance can be measured—not guessed.
DELIVERY FLEET
FedEx Ground Fleets
3–10%
Reduction in fuel consumption
5–9%
Reduction in DEF usage
In high-mileage delivery operations, Ferox demonstrated measurable improvements in fuel consumption and DEF usage while supporting smoother, more consistent day-to-day performance.
EMERGENCY FLEET
Lincoln County Nevada Fire Department
8.14%
Average reduction in fuel consumption
7–13%
Lower idle fuel rates
Across vehicles that spend significant time running and idling, Ferox helped reduce both overall fuel consumption and fuel used at idle.
HEAVY INDUSTRY
LafargeHolcim Mining Operations
REAL-WORLD
Heavy-equipment deployment
DEMANDING
High-load operating conditions
Ferox has been used in demanding mining applications where fuel efficiency, equipment reliability, uptime, and consistent performance directly affect operating costs.
Results shown are from specific real-world applications. Individual results vary based on equipment, fuel quality, maintenance, load, route, idle time, weather, and operating conditions.
REAL DRIVERS. REAL VEHICLES.

WHAT DRIVERS NOTICE BEHIND THE WHEEL.

Every vehicle responds differently, but drivers consistently tell us they notice changes in how their vehicles start, idle, accelerate, and perform from tank to tank.
"
Rob J.
2019 Ford F-350 Lariat
Verified Customer
After using Ferox for about a month, I noticed a smoother idle, quicker starts, better throttle response, improved fuel mileage, and visibly less carbon buildup at the tailpipe. The tablets are also much easier to use than liquid additives—just drop one in the tank and fill up.
Smoother idle Easier starts Better throttle response Improved mileage Less visible soot
Madison K.
27 MPG → 29 MPG
I was skeptical at first, but after consistent use my average mileage increased from around 27 MPG to closer to 29 MPG. The tablets are simple to use, and my car continues to run smoothly.
Improved mileage Easy to use Smooth performance
Karla O.
18-year-old daily driver
EASIER STARTS
After a couple of tanks, I noticed a big difference. My car runs smoother, sounds quieter, starts more easily, and I'm not stopping to fill up as often.
Easier starts Quieter engine Smoother running
Drew P.
PART OF EVERY FILL-UP
My vehicle definitely runs better, and the tablets couldn't be easier to use. I keep the pack in my glove box and drop one in whenever I fill up.
Convenient Better engine feel No mess
Results vary by vehicle, fuel quality, driving habits, mileage, maintenance condition, route, and load.

READY TO NOTICE THE DIFFERENCE?

FIND YOUR FEROX TRY THE SAMPLE PACK
QUESTIONS BEFORE YOU DROP A TAB?

KNOW EXACTLY WHAT'S GOING IN YOUR TANK.

Ferox is simple to use, but the technology behind it is different from conventional fuel treatments. Here are the answers drivers want before trying it.

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. If your vehicle requires a prescribed treatment or has a specific fuel-system concern, follow the manufacturer's instructions or consult a qualified professional.

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.

STILL SKEPTICAL?

GOOD. TEST IT IN YOUR OWN VEHICLE.

Start with the Sample Pack, change one variable, and track your results across two complete tanks. If you don't notice a difference in how your engine runs, you're covered by our two-tank money-back guarantee.
TRY THE SAMPLE PACK VIEW THE TWO-TANK GUARANTEE