- Steve Estabrook, Lead Tuner
- MZR DISI
The Mazda MZR DISI 2.3l turbo engine was never released in a flex-fuel configuration. Due to lower cost at the pump and an R+M/2 octane rating of 95-97, there is a great desire to run E85 fuel in high performance turbocharged engines. Unfortunately, E85 fuel has a significantly different ideal air/fuel ratio than gasoline. As a result, you can not run pure E85 fuel without modifying the fuel calculations, air fuel ratio targets and timing in the ECU. This guide will describe how to use VersaTuner to tune your Mazda vehicle for use with E85 fuel.