MPG X-Caps
How X-Caps Work
A simple, step-by-step explanation of how MPG X-Caps are added to fuel, dissolve into the tank, and are positioned to support combustion.
Use products only as directed. Fuel economy, performance, emissions, octane, and operating results vary by vehicle, fuel, engine condition, maintenance, driving habits, load, weather, and other factors.
The basic process
From Caplet to Fuel Tank
1. Add the Product
Use the correct X-Caps, Mini Motos, or Crumbs format for the tank size and application, then add it to the fuel tank according to the product guidance.
2. It Dissolves and Mixes
Marketplace Global states that a standard X-Cap dissolves and mixes with the fuel. Dissolve time can vary based on fuel quality and conditions.
3. Supports Combustion
The company positions X-Caps as a multi-functional fuel additive designed to support more complete combustion in hydrocarbon fuels.
4. Potential Benefits
Marketplace Global highlights potential support for fuel economy, octane, power, reduced smoke and emissions, and combustion chamber cleanliness.
Combustion support
Why Combustion Matters
Marketplace Global explains the X-Caps concept around improving the combustion of gasoline and diesel fuel.
The company states that improved combustion can support engine efficiency and may help with power, smoke, emissions, fuel economy, and related performance experiences.
Because every vehicle and fuel situation is different, this should be presented as product education rather than a guaranteed result.
Vehicle and fuel compatibility
Built for a Wide Range of Engines
Gasoline Engines
Marketplace Global positions X-Caps for gasoline-powered vehicles and equipment when used as directed.
Diesel Engines
The product family is also positioned for diesel engines, with Crumbs available for larger-capacity tanks.
Flex Fuel and Blends
The company’s FAQ references use with flex fuels, ethanol blended gasoline, diesel, and biodiesel.
Small Engines
Mini Motos are sized for smaller tanks such as motorcycles, scooters, ATVs, mowers, snow blowers, and generators.
Commercial Use
Xtreme Crumbs are positioned for large tanks, trucks, commercial vehicles, industrial applications, and bulk treatment needs.
Use Every Fill-Up
Marketplace Global recommends using the appropriate format with each fill-up for consistent benefits.
Concentrated format
Why a Caplet Instead of a Bottle?
Marketplace Global compares X-Caps to bottled additives by emphasizing that many bottled products include a large amount of carrier fluid.
X-Caps are positioned as compressed active ingredients in a portable caplet or granular format, designed to dissolve into the fuel without carrying a large bottle.
That makes the product easier to store, carry, sample, and match to different vehicle and equipment use cases.
Watch and learn
Recommended How X-Caps Work Videos
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This page explains the product concept and company-provided talking points. It does not guarantee fuel savings, engine performance, octane changes, emissions outcomes, or cost savings. Results vary.