Octane booster with the C63s
#3
The ECU can adjust for the lower octane. Unless you are pushing the car really hard and or have a tune that requires the car to run higher octane there is no point. I would not trust a non approved octane booster in my Benz.
#4
Member
Here in San Diego there's a station with unleaded 100oct and I am so tempted but don't think stock ECU will adjust to it or does it?
Last edited by hotdognobun; 07-04-2017 at 08:00 AM.
#5
Several threads on the topic but no real consensus. Some say stay away from the stuff while others claim benefits. Like everything else, there are risks involved. I did e85 with my M4 and saw some benefits but had an unrelated issue and stopped mixing it.
https://mbworld.org/forums/c63-c63s-...e-booster.html
https://mbworld.org/forums/c63-c63s-...-91-fuels.html
https://mbworld.org/forums/c63-c63s-...ed-tested.html
https://mbworld.org/forums/c63-c63s-...e-booster.html
https://mbworld.org/forums/c63-c63s-...-91-fuels.html
https://mbworld.org/forums/c63-c63s-...ed-tested.html
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#8
Junior Member
Doubtful. If anything, minimal increase in power, nothing that you'll feel. Real way to tell to do back to back dyno runs on 91 vs 100. At $8/gallon for 100 oct, I can live with my stock 503HP.