Should I use unleaded or premium unleaded fuel with unichip?
Your engine should always be tuned using the fuel which you intend to use day to day. Premium unleaded duel will always produce the best power result, as it will allow the engine to use all of the ignition timing in the timing map. As most modern EFI engines utilize knock sensors, if you change from premium unleaded to standard unleaded, the engine’s knock sensors will detect detonation and reduce timing accordingly, resulting in a loss of power.
