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Advanced Fuel Treatment

Fuel Factor X For All Engines

EPA registered, SAE J1321 certified fuel treatment for gas and diesel engines. Better fuel economy, cleaner combustion, longer engine life.

EPA Registered
SAE J1321 Certified
30+ Years Use
Home / Fuel Factor X
What is Fuel Factor X

Concentrated Fuel Treatment for Gas & Diesel Engines

Fuel Factor X is a highly concentrated fuel treatment trusted by commercial fleets, everyday drivers, and equipment owners for over 30 years. It helps your engine burn cleaner, run smoother, and go further on every tank. EPA registered (#217020001) and SAE J1321 certified, it works safely in all combustion engines.

Choose Your Format

Fuel Factor X Products

Fuel Factor X 20 Foil Pack
20 Foil Pack
$54.99

Single pre-measured dose. Perfect for travel, glovebox, or trying it out.

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Fuel Factor X 4oz Bottle
4oz Bottle
$39.99

Single 4oz bottle. Treats one vehicle at a time, easy to use.

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Fuel Factor X 10 Foil Pack
10 Foil Pack
$29.00

10 pre-measured packs. Best for households with multiple vehicles.

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Fuel Factor X Bottle 4 Pack
Bottle 4 Pack
$149.99

Four 4oz bottles. Stock up and save for regular use.

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Fuel Factor X 1 Gallon Jug
1 Gallon Jug
$699.00

Bulk 128 fl oz for fleets, shops, farms, and heavy use.

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Why Fuel Factor X

What It Does For Your Engine

Better Fuel Economy

8.2% SAE J1321 certified fuel economy improvement on average.

Cleaner Engine

Removes deposits and buildup from fuel injectors and combustion chambers.

More Power

Improves combustion efficiency and engine performance across the board.

Longer Engine Life

Reduces wear, corrosion, and oxidation over time for lasting protection.

Gas & Diesel Safe

Works safely in all combustion engines — gasoline, diesel, and blended fuels.

Easy to Use

Just pour in the fuel tank before filling up. No tools, no hassle.

Common Questions

Fuel Factor X — FAQ

Everything you need to know about this EPA registered fuel treatment.

Does Fuel Factor X work in both gas and diesel engines?
Yes. Fuel Factor X is formulated to be safe and effective in both gasoline and diesel combustion engines. It's designed for cars, trucks, RVs, boats, motorcycles, generators, ATVs, mowers, and seasonal equipment.
What does the 8.2% fuel economy improvement mean?
The 8.2% fuel economy gain is certified under SAE J1321 testing standards. This means, on average, vehicles treated with Fuel Factor X showed an 8.2% improvement in fuel economy compared to untreated fuel. Results vary based on engine condition, maintenance history, driving habits, fuel quality, vehicle type, and usage pattern.
Is Fuel Factor X EPA registered and certified?
Yes. Fuel Factor X is EPA registered (#217020001) and SAE J1321 certified, meeting strict government and industry standards for fuel additives and fuel treatment performance. It has been used commercially for over 30 years with 2.5+ billion tracked miles and 65+ million hours of operation.
How often should I use Fuel Factor X?
Most drivers add Fuel Factor X every 3,000–5,000 miles or once per fuel tank, depending on driving frequency and fuel system cleanliness needs. For best results, use consistently. Consult the product label for specific dosage and frequency recommendations based on your engine size and type.
Can I use the foil packs vs. the bottles?
Yes, both formats contain the same concentrated formula — choose based on your needs. Foil packs are pre-measured and great for single treatments or travel. Bottles work well for multiple vehicles. The 1-gallon jug is perfect for fleets and bulk operations.
Is Fuel Factor X a substitute for regular maintenance?
No. Fuel Factor X is a fuel-system supplement designed to support cleaner combustion and engine protection between service intervals. It is not a replacement for regular maintenance, oil changes, filter replacements, or manufacturer-recommended service schedules.
How do I use Fuel Factor X safely?
Add the recommended dose to the fuel tank through the fuel filler neck before filling up with gas or diesel. Never pour it into engine oil, coolant, washer fluid, or other reservoirs. Keep out of reach of children and away from open flame or ignition sources. Follow all label instructions.

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WhatsHemping features Fuel Factor X, an advanced fuel treatment for gas and diesel engines.

Affiliate Disclosure: What's Hemping may earn commissions from affiliate purchases. This comes at no additional cost to you.

Important Disclaimer: Results may vary based on engine condition, maintenance history, driving habits, fuel quality, vehicle type, and usage pattern. Fuel Factor X is not a substitute for regular maintenance or manufacturer-recommended service. Follow all label instructions and dosage guidelines.

Fuel Factor X is EPA registered (#217020001) and SAE J1321 certified for use in compatible gas and diesel combustion engines. Add only to the fuel tank, never to engine oil, coolant, or other reservoirs.

You must be at least 18 years of age to purchase products from this website. Keep all products out of reach of children and away from open flame or ignition sources.