circuitmstr Posted June 20, 2013 Share Posted June 20, 2013 In florida we get 93 at the pump and that is what my car is tuned on. Will 93 octane be available at regular gas stations or at the track in Utah? I would hate to have to bring too much gas out there... Also, What will some of you be doing to re-tune for the altitude that are coming from closer to sea level like me in Florida? Link to comment Share on other sites More sharing options...
CWeber Posted June 20, 2013 Share Posted June 20, 2013 I've only seen 90 and 91 for Premium in Utah myself.. but this is interesting: "Octane is the ability of a fuel to resist knock, and high-compression engines tend to knock more. The obverse of that is that lower-compression engines can run on lower-octane gas. Air is thinner the higher above sea level you go. Less air going into the cylinders means less pressure at top dead center when things go bang. It's a lot like lowering the compression ratio in the engine, reducing the need for high octane. Cars will run just fine on lower-octane fuel when they're well above sea level--and all of those states are. Hopefully, by the time you get back down to denser air, you've burned off most of the low-octane stuff, and can refill the tank with higher-grade fuel. Read more: 30 Car Mysteries Solved: Low Octane Fuel at High Altitudes - Popular Mechanics Follow us: @PopMech on Twitter | popularmechanics on Facebook Visit us at PopularMechanics.com" Link to comment Share on other sites More sharing options...
dgt Posted June 26, 2013 Share Posted June 26, 2013 The pumps at MMP have octanes as follows: diesel, 87, 91, 100, 110 I think the 110 is leaded but I'm not sure. Link to comment Share on other sites More sharing options...
Porscheotto Posted August 13, 2013 Share Posted August 13, 2013 I was at Miller Motorsports Park this past weekend (8/10/13). This is what their pumps displayed: Diesel $4.15/per gal 85 octane unleaded $4.10/per gal 91 octane unleaded $4.32/per gal 98 octane unleaded $9.21/per gal (Sunoco) 100 octane unleaded $9.16/per gal 110 octane leaded race fuel $9.26/per gal Link to comment Share on other sites More sharing options...
ILIKETODRIVE Posted August 13, 2013 Share Posted August 13, 2013 Between the higher altitude and spending some time on the dyno, running 91 should be little to no disadvantage. Link to comment Share on other sites More sharing options...
RickyboobooJohnson Posted August 18, 2013 Share Posted August 18, 2013 Might make a difference if you are running forced induction vs. n/a. Link to comment Share on other sites More sharing options...
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