Fuel Savings
A simple way to help improve fuel efficiency, support cleaner combustion, and get more value from every tank.
Individual results vary based on vehicle condition, fuel quality, driving habits, weather, maintenance, tank size, and how consistently the product is used.
Fuel product overview
What Are MPG X-Caps?
MPG X-Caps are fuel catalyst caplets designed for gasoline and diesel engines. Added at fill-up, they dissolve into the fuel and are designed to support more complete combustion.
Drivers use X-Caps to help improve fuel economy, increase octane, support engine performance, and reduce smoke and emissions.
Whether you drive a personal vehicle, operate equipment, manage a fleet, or maintain recreational vehicles, X-Caps offer a simple addition to your regular fueling routine.
Key benefits
Why Drivers Use X-Caps
Better Fuel Economy
Designed to support more complete combustion and help drivers get more value from each tank.
Increased Octane
May help support higher octane performance without changing normal fueling habits.
More Power
Some drivers report improved responsiveness, smoother acceleration, and better engine feel.
Cleaner Combustion
Designed to support cleaner combustion chamber operation as fuel burns more efficiently.
Reduced Smoke
Designed to help reduce smoke and visible exhaust emissions when used consistently.
Gas & Diesel Compatible
Suitable for many gasoline and diesel applications when the proper product size is used.
Choose your next step
Learn More About X-Caps
Product Information
See the available X-Caps options, recommended uses, fuel compatibility, and general product details.
Product Information
How X-Caps Work
Learn how X-Caps are designed to dissolve into the fuel and support more complete combustion.
How It Works
Frequently Asked Questions
Find answers about usage, dissolve time, fuel types, vehicle compatibility, and what results to track.
View FAQs
Fuel Savings Calculator
Estimate possible savings based on fuel price, tank size, fill-ups, mileage, and your actual driving habits.
Calculate Your SavingsApplications
Works Across a Wide Range of Vehicles and Equipment
X-Caps are used in a wide variety of gasoline and diesel-powered equipment including cars, trucks, SUVs, RVs, motorcycles, boats, generators, farm equipment, construction equipment, and commercial fleets.
The key is choosing the right X-Caps option for the tank size and application. Personal vehicles, small engines, recreational equipment, and large-capacity tanks may use different formats.
Watch and learn
Recommended X-Caps Videos
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Real Driver Experiences
Customer experiences should be presented as individual stories, not guarantees. Use approved testimonials only and remind visitors that results vary based on fuel type, driving habits, maintenance, vehicle condition, weather, and other factors.
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Want to See Whether X-Caps Make Sense for Your Vehicle?
Request product details, usage guidance, videos, customer experiences, or ordering information. A Marketplace Global representative can help you choose the right X-Caps option for your vehicle, fleet, small engine, or fuel-use situation.
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Individual results vary. Fuel economy, performance, emissions, and cost savings may be affected by vehicle type, engine condition, fuel quality, tank size, terrain, weather, driving habits, maintenance history, tire pressure, load weight, and how consistently the product is used. This page is for product education and should not be presented as a guarantee of savings or performance.