What gas quality should I use with my remapped engine?

First of all avoid using the cheap gas available typically with no brand names. Even if this does not imply you would get bad quality gas systematically, it does happen more often to get quality issue. For the petrol engines, IT IS ABSOLUTELY REQUIRED TO USE MIN 98 octane quality. Our engine mappings are optimized for high quality gas to be able to provide the right power enhancements and give the engine reliability you are expecting. If you do drive with lower octane quality, the engine will generate some “knocking” and eventually damage the engine.