⛽ Choose Your Option

Get More Miles.
Spend Less.

One concentrated formula. Four ways to get started. EPA registered, SAE tested, and trusted by drivers for 30+ years.

✓ EPA Registered ✓ Gas & Diesel Safe ✓ No Warranty Issues ✓ 30+ Years Proven
Fuel Factor X Products

Pick the Right Option for You

All products contain the same proven FFX formula. Choose based on how much you drive and how long you want to go between orders.

Fuel Factor X 4oz Bottle
Starter Fuel Factor X 4oz Bottle

Fuel Factor X 4oz Bottle $59 treats up to 320 gallons of fuel. The classic pour-in format — perfect for first-time users or daily drivers filling up at the same station.

$39.99 $59.00
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FFX Bottle 4-Pack
⭐ Most Popular Fuel Factor X 4oz Bottle 4-Pack

Fuel Factor X 4oz Bottle 4-Pack gives you four bottles at the best per-bottle price. Designed to optimize combustion efficiency and improve fuel economy — long-term engine care made simple.

$149.99 $219.00
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FFX Foil 10 Pack
On the Go Fuel Factor X Foil 10 Pack

FFX Foil 10 Pack — pre-measured single-use pouches, each treating up to 20 gallons. Ideal for travel, road trips, or keeping in your glove box. Tear, pour, drive.

$29.99 $43.13
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FFX Foil 20 Pack
Best Value Fuel Factor X Foil 20 Pack

FFX Foil 20 Pack — 20 pre-measured single-use pouches for maximum coverage. Lowest cost per treatment of any foil option. Ideal for high-mileage drivers and fleets.

$54.99 $86.25
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Which Option Is Right for You?

Product Format Coverage Best For Price
4oz Bottle Pour-in bottle 320 gallons First-time users, regular fill-ups $39.99 $59
Foil 10 Pack Single-use packs 10 fill-ups Travel, convenience, glove box $29.99 $43
4oz Bottle 4-Pack ⭐ 4 bottles 1,280 gallons Best overall value — everyday drivers $149.99 $219
Foil 20 Pack Single-use packs 20 fill-ups High-mileage, fleets, stock up & save $54.99 $86

How to Use Fuel Factor X

No special tools. No complicated process. Three steps and you're done.

01 ⛽

Add FFX to Your Tank

Pour or add the recommended amount directly into your fuel tank before you fill up. For foil packs — tear and pour.

02 🔋

Fill Up as Normal

Add gas or diesel as you normally would. The fuel mixes the treatment throughout the tank automatically.

03 🚗

Drive as Usual

That's it. FFX works through your fuel system as you drive. No special steps, no waiting, no changes to your routine.

🛡

Does Not Void Your Engine Warranty

Under the Magnuson-Moss Warranty Act, engine manufacturers cannot void your warranty due to use of a fuel additive unless they can prove it caused the failure. FFX has been in commercial use for 30+ years with zero reported warranty issues from fleet operators.

Questions Before You Buy

The recommended treatment rate is 1/4 oz per 20 gallons of fuel. Foil packs are pre-measured — one pack per fill-up. For the bottle, follow the dosage guidelines on the package. Over-treating does not harm your engine but will not produce better results.
Fuel Factor X works in all gas and diesel combustion engines — cars, trucks, SUVs, RVs, boats, motorcycles, and fleet vehicles. It is not designed for electric or hybrid-only vehicles.
Some drivers notice smoother performance in the first tank. The full benefits — especially fuel economy improvements — build over multiple tanks as FFX works through your entire fuel system. Fleet test data was collected over six weeks of consistent use.
Same formula, different packaging. The bottle is a pour-in format ideal for home use. Foil packs are pre-measured single-use pouches — convenient for travel, road trips, or keeping in your vehicle. The Executive Pack gives you both.
Yes. FFX includes a fuel stabilizer component that helps keep stored fuel fresher and more reliable between uses — ideal for boats, RVs, lawn equipment, and seasonal vehicles.
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