... regular 95ron, Tesco's new 99ron, BP Ultimate and Optimax. The tests were carried out back to back on an engine dyno, (ie engine out of car) They started with a base ignition setting of 13 degrees and then advanced the ignition 1 degree at a time until the engine showed signs of detonation. All the while taking note of the respected power figures from each fuel brand along the way.I cant remember the exact power figures off of the top of my head but I can tell you the order in which the fuels tested come in.
..1st) Optimax
2nd) BP Ultimate
3rd) Tesco 99ron
4th) 95ron
The Optimax was able to manage a considerable ignition advance compared to the other fuels tested and netted a great deal more bhp
& torque as a result !This is the first test of it's kind that I have come across to date and one that I fully believe in due to the strict and scientific way in which it was carried out.
So personally I will be putting my money in the direction of Optimax
Mikejc