Should I use Octane Boosters?

Where the Lancer Evolution models are built initially for Japan, the car is forseen to run on Octane 100 RON or higher. The maximum rated fuel that is obtainable from filling stations in Europe is 99 RON (which is been claimed by Jet). Using a lower RON rated fuel than was intended by the manufacturer means the engine will not be running at it.s maximum potential and if the RON rating is too low it can actually be harmful (generally don't use fuel rated less than 98 RON unless in an emergency, see .What fuel should I use?.). You can use an Octane Booster to increase the fuels Octane Rating to 100 RON (or more). I should only advise to use Octane Boosters during winter when detonation could occur. Bringing Octane rate up to 100 should be sufficient. The official line is not to use Octane Boosters, please talk to your local dealer what to do when detonation occurs and what can be done (reprogram engine ECU when detonation occurs to often, or use of Octane Booster when detonation is seldom).