Powerchip on W211 E55
I wonder what the 91 octane program would get. I don't have time to run around finding 100 octane gas.
You can run 91 on a 93 chip, the anti-knock sensor will retard the ignition to whatever octane you are running. I don't know about the long-term effects though.
Some magazine tested a bunch of Octane Boosters and none of them lived up to what they claimed. That's why I have been using the 91/100oct mix.
Drive Safe, but FAST.
I hated the throttle response and I figured they could get more fuel.
I have 93/94 octane in NY, so I should be fine.
Does it feel like a different car now?







