A fuel system modification allows a vehicle, specifically the Subaru BRZ or Toyota 86 (often referred to as the “FRS”), to operate on varying blends of gasoline and ethanol, up to 85% ethanol (E85). The modification typically includes sensors, a control module, and potentially fuel system upgrades to accommodate the different fuel properties. These components work together to monitor the ethanol content of the fuel and adjust engine parameters accordingly.
The ability to utilize higher ethanol content fuels offers several potential advantages. E85 generally has a higher octane rating than gasoline, which can lead to increased engine performance, particularly in forced induction applications. Furthermore, ethanol is a renewable fuel source, and its use can contribute to reduced greenhouse gas emissions. This technology has evolved from earlier efforts to improve fuel efficiency and reduce reliance on fossil fuels, gaining popularity with enthusiasts seeking both performance gains and environmentally conscious options.
