• 500 000 000+

    miles with eFlexFuel

  • 20 000+

    vehicles converted

  • 4.7/5

    rating based on over 100 reviews


By utilizing E85 fuel with an eFlexFuel conversion kit, you can improve your engine performance by up to 15%. eFlexPlus and eFlexPro conversion kits include eFlexApp and eFlexTuner softwares for additional engine optimization.

By using E85 fuel, you can also decrease your carbon footprint by up to 40 %. That means that your large truck or SUV will produce CO2 emissions comparable to hybrid vehicles, along with improved engine quality.

Compatibility Check

How does eFlexFuel E85 conversion kit work?

The eFlexFuel conversion kit connects to the ECM and fuel injectors in your engine. All of the electrical and fuel line connectors you need are provided. The eFlexFuel conversion kit includes an ethanol content sensor that monitors the ethanol content of the fuel entering your engine, and automatically adjusts the fuel injection to provide the most efficiency and power.  Once the kit is installed there's no need to adjust it or make any other changes to your vehicle.

The E85 conversion kit is simple to fit yourself

eFlexFuel is a 100% plug and play solution. Installation usually takes about 1-2 hours. Check out our installation videos, instructions or contact our experienced engineers for advice.

Find your nearest E85 fuel station



Hear what people are saying about eFlexFuel e85 conversion kit

Chevrolet Silverado 2500 HD

flexfuel solution benefits

Meet Michael and his Chevrolet Silverado 2500 HD. Michael decided to convert his pickup truck to run on ethanol. Having eFlexPlus installed in his truck, he doesn't only save money and cut his emissions - he also supports the local farmers and improves the performance of his Chevrolet.

Driver experience

150 000 miles with E85 fuel

Tuomo, our CEO, has driven over 150 000 miles using the E85 fuel. In addition to savings on fuel costs and reduced carbon footprint, he has been getting 5% more power by using E85 high octane fuel.

Driver experience


Mike has driven 20 000 miles on E85 with his Nissan Versa. In addition to a noticeable increase in power, Mike enjoys the freedom of choosing a suitable fuel, reduction of his carbon footprint and supporting of local farmers.

The most advanced and easy-to-use

E85 conversion kit

The eFlexFuel team invented the flex fuel conversion kit in 2012


In 2012, the eFlexFuel team created the first flex fuel conversion kit that allows gasoline vehicles to use any mix of bioethanol. The goal was to create a technically advanced solution to decrease CO2 emissions from existing vehicles whilst also making it affordable and simple to install.

Two engineers working on advanced fuel injection techniques

The result of over 8 years of research and development


Our team of automotive engineers work constantly to upgrade and develop the eFlexFuel E85 conversion kits. Our innovations have created three products ranging from the fully automated eFlexEco through to eFlexPlus and eFlexPro which allow you to control every aspect of your engine in order to maximize its power. eFlexFuel processes are also ISO9001 certified.

Laptop showing the advanced eFlexFuel control software

Extensive testing in every environment - from the Arctic to deserts


Over 500 million miles have been driven by eFlexFuel users worldwide cutting over 40 000 tons of emissions. Our solution is highly recommended by our customer base with a Net Promoter Score of 78. eFlexFuel E85 conversion kits were selected amongst the top six picks by eBay Motors at SEMA 2020.


eFlexFuel test car on a road