How Does the eFlexFuel kit work?
The most advanced flex-fuel systems on the planet
eFlexFuel systems are installed under the hood and give your vehicle the freedom to run on E85, gasoline, or any blend of the two — no manual adjustments needed. The system automatically detects and adapts to the fuel mix in your tank, ensuring smooth and reliable performance.
Your vehicle will drive just as it did before installation, with the added benefits of enhanced performance and reduced emissions when using E85, a cleaner and more sustainable fuel option.
eFlexFuel expands your vehicle’s fueling capabilities
eFlexFuel systems work seamlessly with your vehicle’s ECU to deliver precise fueling for gasoline, E85, or any blend in between. The system continuously analyzes the ethanol content—over 100 times per second—while monitoring each injector’s native signal. This real-time data ensures optimal fuel delivery tailored to the exact blend in your tank.
As your fuel mix changes, eFlexFuel instantly adapts, providing smooth, automatic adjustments without any input from you. The result? Effortless drivability and peak performance, no matter what fuel you choose.
+Is eFlexFuel user friendly?
Thanks to eFlexFuel’s smart, automatic fuel adjustment, using the system couldn’t be easier. Whether you're near an E85 pump or only have access to gasoline, just fill up with whichever fuel is available—no need to worry about what’s already in your tank or how much you're adding.
Simply grab the E85 or gasoline handle, fill up, and drive. The system takes care of everything behind the scenes, giving you total flexibility and convenience.
+Can you really mix e85 and gasoline together with eFlexFuel?
Yes, with an eFlexFuel kit installed, you can freely mix E85 and gasoline in your tank. Why? Because both fuels are made from the same two ingredients—ethanol and gasoline—just in different proportions.
- Gasoline (E10): Most pump gasoline contains about 10% ethanol and 90% gasoline.
- E85: Contains approximately 85% ethanol and 15% gasoline (though the exact ratio can vary slightly).
When you mix E85 and gasoline, you're simply creating a new ethanol-gasoline blend. For example, if your tank is half full of E85 and you top it off with gasoline, you’ll end up with a blend around E47—and that’s perfectly fine!
💡 The eFlexFuel system makes this easy. It uses a high-speed ethanol sensor that analyzes the fuel blend over 100 times per second, automatically adjusting fueling to match the ethanol content—whether it’s E10, E85, or anything in between.
In short: Just fill up with whatever fuel is available—E85 or gasoline—and drive. No settings, no guesswork. eFlexFuel takes care of the rest!
+How eFlexFuel Works with Your Vehicle’s ECU
Your vehicle is constantly adjusting its fuel mixture to maintain optimal performance and emissions. It does this by targeting a specific exhaust gas composition, using feedback from sensors in the exhaust system. In its original form, your vehicle is designed to reach this target using gasoline.
With eFlexFuel, your vehicle gains the ability to make broader fuel adjustments, allowing it to reach that same optimal exhaust composition using E85, gasoline, or any blend in between. The system works seamlessly with your vehicle’s ECU—no programming changes required.
✅ Because the ECU remains untouched, all manufacturer safety and emissions controls stay fully intact, ensuring safe and reliable operation at all times.
In short: eFlexFuel expands your fuel options while keeping your vehicle’s original systems working just as they should.
Boosted Performance with E85 + eFlexFuel
Experience a noticeable upgrade in horsepower, torque, and overall engine performance when running E85 with an eFlexFuel system installed. This powerful combination works together to unlock your engine’s potential—delivering a more responsive and exciting drive, all while supporting cleaner fuel choices.
Performance
E85 facts
- E85 contains about 30% oxygen by weight, compared to just 0–3.5% in regular gasoline. This higher oxygen content allows for more fuel and more complete combustion—translating into increased power.
- Ethanol cools the intake charge during vaporization, lowering air temperatures when the air-fuel mixture ignites. This “charge cooling” effect not only boosts power slightly but also enhances ethanol’s natural resistance to engine knock.
- E85’s high octane rating significantly reduces knock risk. Combined with the cooling effect, E85 offers excellent knock resistance under normal driving conditions. This means your engine’s ECU doesn’t need to pull timing, allowing for optimal performance—something gasoline can’t always guarantee.
- Ethanol’s combustion characteristics improve cylinder pressure and power:
- Faster ignition with less delay.
- Quicker flame front propagation.
- These traits lead to faster pressure buildup in the cylinder, improving both efficiency and output.
- Turbocharged engines benefit even more. E85 increases exhaust gas flow, helping turbos spool faster and deliver power more quickly.
eFlexFuel: The Essentials at a Glance
- Flexible Fuel Compatibility: eFlexFuel kits install neatly in your engine bay, allowing your vehicle to safely run on E85, gasoline, or any blend of the two.
- Fully Automatic Operation: No user input required. The system works seamlessly without altering your vehicle’s ECU, preserving all original safety and emissions controls.
- Performance Boost: Running E85 with eFlexFuel delivers enhanced engine performance while supporting cleaner fuel choices.
- Engineered for Excellence: Designed and manufactured in Finland, eFlexFuel kits come with an industry-leading 5-year warranty and cutting-edge technology that sets the standard in flex-fuel systems.
In short: eFlexFuel kits are the most advanced and reliable flex-fuel systems available today—giving you power, flexibility, and peace of mind.
