Quote Originally Posted by Serge View Post
my car's rated for 93, i used petrocan's but didn't like it and went back to Shell (what i always used for all my cars) and just used their 91.

I gave the Esso a try right when it popped up and i like it, could be placeebo but the car runs smoother (as it should, since its designed for higher octane) but somehow different than the petrocan.

meh
I find mine seems to pull out of the torque dip sooner and harder on petro 94 than shell 91, but I haven't logged it to see if it's all in my head or not. I typically only run 94 when I know I'll be beating on it a lot, I get noticeably better mileage on shell 91.

I have to finish rescaling my MAF and flash that tune before I start looking at any knock on 91, when I get to that I'll try to get comparable logs between 91 and 94 to see if/where it makes more power and where it might be knocking.