Well I stopped to fill up with gas at a gas station by my job that I usually don't fill up at and they had 110 octane fuel for 3.00 a gallon. I run my car with 93 alway but(oh oh) would this have any negative with using it? My car has a stock d16y7 running of a stock p06 and the usual hmt setup w/hf mani to wrx turbo 1st gen dsm bov, dsm smic, catless 2.5 exhaust, vortech 12:1 fmu, and oh yeah the fish tank check valves!

 

If its leaded it will kill your o2 sensor over time, you will probably lose a bit of power as well. If your car isn't detonating on 93. It would be better to turn the boost up or run more ignition timing with the race gas. Best to work that kind of thing out on the dyno. HTH's

 

so if my car tuned on 93, adding higher unleaded octane fuel won't really do anything good?

 

It will probably make it run on the rich side.

 

No it will run colder so if you were racing it might be safer. But if your tuned well then no you would probably go a little slower.