![Fueltech FLEX FUEL SENSOR](http://www.c2racing.pt/cdn/shop/products/FlexFuelSensor_2_{width}x.png?v=1611611697)
Ethanol content is a basis for many functions in an engine. The ethanol content as a variable can be the difference between having optimised ignition timing, fuel injection and boost levels when tuning versus average output when not compensating for the variable.