ebatr24
Senior Member
- Joined
- Jan 20, 2018
- Threads
- 10
- Messages
- 974
- Reaction score
- 730
- Location
- Oregon
- Vehicle(s)
- 2017 Civic Type R, 2018 Civic Si Coupe
It is not about whether he has an Si or non-Si, I was referring to that fuel quality in Oregon is not as bad as other areas. I never really saw it rise unless I was repeatedly doing WOT pulls on my Si with 92 from most stations in Oregon, Chevrons, Shells, etc.... Now him having a non-Si means his knock control will rise more than an Si, it will likely happen even on 93 as well so I suppose upping the octane would be helpful the degree of how much is to be determined though. As for what it raises your octane, it is hard to tell. Using a calculator online if you used a gallon of e85 100 octane, it would not even raise your octane to 93 but would make your ethanol content just slightly over 16%.I know he's not an Si but on TSP Stage 1 for Si I had knock control elevate all the time with pump 92, and it would stay stable at .49 99% of the time with a gallon of E85.
It definitely helps, most tunes target 93 octane but obviously most are "safe" with 91/92 (except TSP stage 1 +).
Now I always grab E85 when I fill up because I've moved to stage 1+ that absolutely requires 93+, so it makes something around 93-94 out of the 92 here.
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