WebJul 16, 2013 · As far as I know, "premium gas" is anything 91+ (nevermind race fuel), so I should be fine. I haven't noticed any pinging or knocking with the 91 ethanol-free, but I have noticed slightly better gas mileage (21.5 compared to my usual 18-20). Anyone else here seek out ethanol-free fuel for their vehicles? WebJun 22, 2024 · 87 ethanol 90 without ethanol 91 ethanol 93 ethanol Is 90 without ethanol better than 91 or 93 with ethanol for performance? Down road (what I use) is shell, I typically fill up 87 ethanol. But I’m thinking about filling up at Casey’s for a fun tank here and there. So what’s better, 90 without ethanol or 93 with? Shell has 93 with ethanol.
Test & Tune: 2024 Subaru WRX 91-Octane vs E85
WebDec 22, 2024 · If you compare the performance of gasoline and E85, the latter undoubtedly produces more power. Its latent evaporation heat is higher than that of the pump gas. This means that when it transforms … WebAug 2, 2024 · These numbers are called the ‘octane-rating’, and are an indication of how well the fuel resists burning too early inside the car’s engine. Standard petrol is given a 91 rating, while premium unleaded is both 95 and 98. There are also two ethanol-based fuels – E10 and E85 – which are more environmentally friendly options. firestone complete auto care athens ohio
Everything You Need to Know About E85 - MotorTrend
WebMar 15, 2024 · They build custom flex fuel tunes to run E85 on those as it is available here and high octane. Also, race gas is like 10 bucks a gallon, so mixing to 93 is REALLY expensive. My uni stage 2 is for 93 but can run 91. I know it would be better on 93 but is as good as an APR 91 tune running 91. I would really like to take full advantage though. Apr 29, 2009 · WebMay 25, 2014 · From my understanding E85 is much higher octane than 91 but it's not as efficient. I had between 1/8-1/4 of tank of 91 when I added 10 gallons of E85 today to test it out. So after I run this tank down I will add more E85 and start calculating, if I can get better mileage with E85 than 91 then I will happily switch to get the higher octane. firestone complete auto care 25170 maren way