I am interested in this as well. We can only get 91 in New Brunswick as far as I know and I am sure that will pull the timing way back. I would like to be able to get the best out of my C63 and I am sure that 91 will not allow it.
I have never run an octane booster and would be interested in any opinions from people who have. Brand preferences and inexpensive places to purchase would be helpful as well.
Problem is that Sunoco has been bought out by Suncor whose main player is Petro Canada, all the Sunoco gas stations are being converted to Petro Canada....good thing is, that all these Sunoco stations being switched to Petro Canada will still carry the Ultra94 gas....
SLS Irridium Silver, 2014 GL350 BT Irridium, 2015 White Dodge RAM Hemi Quad
That is interesting reading and more than I knew before. Thank you.
While I am sure the car will run fine on 91 (at least I hope it will) I am sure that it will not run its strongest and I suspect it will run a detuned spark table to avoid KR and run a safe tune. I kind of hope that the manual will tell the tale. If not a little experimentation should.
Has anyone done the maths to figure out if it's cheaper to buy a full tank of 93 or is it cheaper to buy 91 and add a bottle(s) of octane boost to get from 91 -> 93? Surely these are two very different markets, and given the price of gas these days I suspect there may be an arbitrage opportunity. I suppose there may be other factors that I'm not considering, but just a thought.