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EvanZR1 · 05-10-2019

I've been running 93 on my 391 cubic inch motor with 12:1 here in Texas with no problem. I'd imagine you'd be fine on 92 in MN, but if you need to up it, you can add some Boostane or Torco. Don't bother with parts store octane "boosters" as they move the octane typically 1 "point", which if you read their fine print they define as .1 (so from 92 to 92.1). Torco and Boostane will move it full numbers based on the mix ratio you use. I used Torco on my '13 GS with a blower when I was in areas where I couldn't get 93, and it worked great. Only thing with Torco (not sure on Boostane) is it will turn things orange (i.e. plug tips). It doesn't hurt anything, but if you're not expecting it, you'll be surprised.

05-10-2019	#5
EvanZR1 Join Date: Nov 2010 Location: Omaha Posts: 403	Re: Fuel for higher compression I've been running 93 on my 391 cubic inch motor with 12:1 here in Texas with no problem. I'd imagine you'd be fine on 92 in MN, but if you need to up it, you can add some Boostane or Torco. Don't bother with parts store octane "boosters" as they move the octane typically 1 "point", which if you read their fine print they define as .1 (so from 92 to 92.1). Torco and Boostane will move it full numbers based on the mix ratio you use. I used Torco on my '13 GS with a blower when I was in areas where I couldn't get 93, and it worked great. Only thing with Torco (not sure on Boostane) is it will turn things orange (i.e. plug tips). It doesn't hurt anything, but if you're not expecting it, you'll be surprised.