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Orders Placed Before 3PM MST Ship Same Day

First-Time Buyer? Enjoy 10% Off Your First Full Pack Order! Use Code IGNITE10

Orders Placed Before 3PM MST Ship Same Day

First-Time Buyer? Enjoy 10% Off Your First Full Pack Order! Use Code IGNITE10

Orders Placed Before 3PM MST Ship Same Day

First-Time Buyer? Enjoy 10% Off Your First Full Pack Order! Use Code IGNITE10

Orders Placed Before 3PM MST Ship Same Day

First-Time Buyer? Enjoy 10% Off Your First Full Pack Order! Use Code IGNITE10

Orders Placed Before 3PM MST Ship Same Day

First-Time Buyer? Enjoy 10% Off Your First Full Pack Order! Use Code IGNITE10

Orders Placed Before 3PM MST Ship Same Day

First-Time Buyer? Enjoy 10% Off Your First Full Pack Order! Use Code IGNITE10

Orders Placed Before 3PM MST Ship Same Day

First-Time Buyer? Enjoy 10% Off Your First Full Pack Order! Use Code IGNITE10

Orders Placed Before 3PM MST Ship Same Day

First-Time Buyer? Enjoy 10% Off Your First Full Pack Order! Use Code IGNITE10

Orders Placed Before 3PM MST Ship Same Day

First-Time Buyer? Enjoy 10% Off Your First Full Pack Order! Use Code IGNITE10

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TRY FEROX — FIND YOUR FIT

Experience how Ferox performs across gas and diesel engines before committing to a full pack.

The Ferox Sample Pack is our best option to try Ferox for yourself. Same tabs. Same performance. Built to let you feel how Ferox works in your engine before stepping up to a full pack. 1 Tab = 20 Gallons, 4 Tabs Per Pack

$16.97 USD
$16.97 USD
Sale Sold out
In stock (511 units), ready to be shipped

Two-Tank Money-Back Guarantee: Run Ferox for two full tanks. If you don’t notice a difference in how your engine runs, we’ll refund your purchase—no questions asked.

Ferox improves how fuel combusts, helping engines run smoother and more consistently.

That means:

  • Easier Starts
  • Smoother Consistent Throttle Response
  • Fewer Gas Station Stops
  • Decreased Soot & Emissions
  • Increased Power

Not every engine is the same from mileage to cylinder count to fuel type—and your experience and what you measure will depend on you as well.

The Sample Pack lets you:

  • Try Ferox without committing to a full pack
  • Compare formulas across different engines
  • Find the best fit for how you drive, ride, or work
  • Upgrade confidently once you know what works best

It’s the easiest way to get started with Ferox.

View Product Details
Real User Experience

Fueled by Your Stories

I can confidently say that its advertised claims are accurate and as a user, you should anticipate experiencing these benefits as well.

5 | 5.0 Reviews

So after finding this product on Amazon, ordering it and subsequently using it for about a month I can confidently say that its advertised claims are accurate and as a user, you should anticipate experiencing these benefits as well. Here are the highlights of my personal experience using these tablets in my vehicles that are repeatable on my daily driver Forester:

- noticeably smoother idle and quicker starts
- quicker throttle response from off idle at a stoplight/sign up through the low to mid power bands.
- improved fuel mileage, even with seasonal "winter" fuel.
- much less carbon on the tailpipe (note: I wasnt anticipating this due to modifications made to my engine, but it is definitely reduced)
- horsepower improvement appears likely

Now, other benefits would be the convenience factor and for those of us that use fuel additives prior to filling up, this is a major bonus. Simply dropping in a tab or two versus adding a liquid based product that usually needs wiping up afterwards, plus the small packet size is a win/win. I've been in communication with customer representative back and forth and this company is very customer oriented, and they look forward to hearing about your experiences or if you have questions for them. Barring any prior mechanical issues with your engine, you are guaranteed to have a positive outcome by using these tablets in your vehicles' fuel. I will be using these for the life of my vehicles.

- Rob

My car runs smoother, it's quieter, starts easily, and I'm not filling up as often as before. It's so easy.

5 | 5.0 Reviews

A friend mentioned this product to me and I was excited to find it on Amazon. My vehicle is 18 yrs old and was having trouble starting. I commute hundreds of miles weekly through inclement driving conditions. I'm so glad I tried FEROX! After only a couple tank fill ups I noticed a big difference. My car runs smoother, it's quieter, starts easily, and I'm not filling up as often as before. It's so easy. There's nothing difficult to understand, nothing to set up, just a tablet that you add when you fill up. And it even has separation marks for easy splitting in case you're only filling up 1/2 tank or so. No waste! I was also thrilled to find out it's Made in the USA. Whether you have an older or newer car, no matter where you live or how much or little you drive, USE this! It truly works. It's also a great gift idea for friends and family. Great product, I love it! Thank you FEROX!

- Karla O

Before using them, my average gas mileage was around 27 mpg, and after a consistent use, I’m now averaging closer to 29 mpg.

5 | 5.0 Reviews

I was honestly a bit skeptical at first, but Ferox fuel tablets actually made a noticeable difference for me. Before using them, my average gas mileage was around 27 mpg, and after a consistent use, I’m now averaging closer to 29 mpg. It’s not a dramatic jump, but over time it definitely adds up and saves money at the pump. The tablets are easy to use and I didn’t notice any negative effects on how my car runs. The engine feels just as smooth as before, and I like knowing I’m getting a bit more efficiency out of each tank. If you’re looking for a simple way to slightly improve fuel economy, these are worth trying.

- Madison

Not only have I gained a few mpg’s, my bike runs smoother with more pep!

5 | 5.0 Reviews

I have taken these tablets and halved them, drop on into my tank then fill up. Not only have I gained a few mpg’s, my bike runs smoother with more pep! I ride a 23’ Royal Enfield Interceptor, I was looking for an additive to assist in keeping the fuel system clean and possible assist in mpg, I found it!
Next winter I will run my imaging scope through and inspect inside the fuel system, as of this moment though, I am thoroughly satisfied and impressed!
I am not one that believes in a lot of additives, a machine should be designed and built to function without, though due to all of the emission requirements and regulations, most of our vehicles are choked and restricted (My back ground, retired certified master tech). I firmly believe this additive is a way to get the most efficiency out of ones vehicle.

- Lay Jeffrey

It is so simple to add into the tank and my gas mileage has improved

5 | 5.0 Reviews

I can’t say enough about this product. The fact that it is small tabs and not messy liquid is great, but even better is the fact that it does not use single use plastic bottles! It is so simple to add into the tank and my gas mileage has improved and I know that it is helping the environment by not only increasing fuel efficiency but burning cleaner and reducing emissions. I drive a Toyota Highlander Hybrid and Ferox works so well, I use a tablet every time I fill up! It’s not just saving money with better mileage, but also so good for the environment!

- CC

Well, well, WELL! Man, totally surprised by the Ferox fuel tabs!

5 | 5.0 Reviews

Well, well, WELL! Man, totally surprised by the Ferox fuel tabs! I use a couple of smaller generators for my buisness and typically will get right at 7 hours of runtime on a medium load of about 2000watts. These gens have 2.2 gallon tanks which I always fill right to the top. I used these in the exact application Monday and only difference was taking a quarter of a Ferox fuel tab and snapping it in half and placing in each tank. After my work that night (7 hours,) they are normally dry and ready for refill. Upon refilling for work on Tuesday, the tanks only allowed 1.3 gallons apiece! That means I will easily get another 4-5 hours out of each fill-up! On top of that, the 5 year old generators seemed to purr their way through the work! I ordered more and cannot wait to see the results in my truck! Excellent product! Highly recommend!

- Devin S

5 | 5.0 Reviews

I've been using these for 3-4 years in my porsche. With the tabs, I can run regular gas without problems; in fact, the car actually runs more efficiently on regular gas with the tabs, than on premium gas without the tabs--and I'm saving 50-60 cents per gallon.

- Charles Roberts

FAQ

Know Before You Drop A Tab

Yes. All Ferox is compatible across all fuel types. Ferox is designed for all diesel and gas engines, including semi trucks, work vehicles, full tons, generators, heavy equipment, off-road machinery and more.

  1. Choose the Ferox formula that matches your tank size (Sample Packs treat 20 gallons per tab)
  2. Drop one tab into the fuel tank
  3. Fill up and run the tank as normal
  4. Pay attention to how your engine feels

No measuring. No mixing. No special steps.

The Sample Pack is perfect if you:

  • Own multiple vehicles or machines
  • Want to try Ferox before committing
  • Aren’t sure which pack fits your setup yet
  • Want a simple, low-risk introduction to Ferox

If you already know which Ferox you need, a full pack or subscription may be a better value—but the Sample Pack is the best place to start.

Ferox is built for continuous use. Many users run it every tank to keep performance consistent over time.

Just drop 1 tablet into your tank before you fill up. Use it every fill for the best performance and engine cleanliness.

Ferox comes in a drop-in tab:

  • No measuring
  • No spills
  • No storing bottles

While most additives clean the fuel system or emissions after the fact, Ferox focuses on combustion itself—helping fuel burn more completely to reduce buildup and inefficiency.

Most customers do. Once you know which Ferox fits your engine, a full pack or subscription offers the best long-term value.