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Performance You Can Feel — Start With Your Next Tank
Get fuel that burns more completely, so your engine runs smoother.
Ferox Blue is for gasoline vehicles you rely on every day—from commuters and weekend warriors to performance builds & everything between. 1 Tab = 20 Gallons, 10 Tabs Per Pack
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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.
What Does Ferox Do?
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 Emissions
- Increased Power
Is Ferox Blue For Me?
Ferox Blue is built for gasoline vehicles—cars, trucks, SUVs, and performance builds.
If you want:
- A smoother driving feel
- Better throttle response
- Fewer inconsistencies from tank to tank
- More confidence in how your engine runs
…Ferox Blue fits right into your routine. Just drop a tab in and drive.
Get Ferox Delivered Every Month:

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.
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.
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.
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!
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
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!
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
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
Know Before You Drop A Tab
Does It Work In Gasoline?
Yes. Ferox Blue is specifically formulated for gasoline vehicles and is safe for daily use in modern engines.
Is Ferox safe for modern gas engines and emissions systems?
Yes. Ferox Blue is safe for catalytic converters, oxygen sensors, and modern emissions systems.
What will I actually notice using Ferox Blue?
Most drivers notice smoother acceleration, better throttle response, and a more consistent driving experience—especially over multiple tanks. That means long term engine performance and efficiency leading to improved mileage as well.
Is Ferox for one-time use or continuous use?
Ferox Blue is built for continuous use. All 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.
How is Ferox different from liquid diesel additives?
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.
Who is Ferox Blue best for?
Ferox Blue is ideal for daily drivers, commuters, enthusiasts, and anyone who wants their gas vehicle to run smoother and more consistently.


