Anyone know where to get higher than 91 octane?
 

Im located in Bellevue, 10-15 minutes away from Seattle. I just wanted to know if anyone knows of a place that has like 100+ octane near around here. I feel like there should be some around the area. There are a lot of high end cars in Bellevue

auburn by drift office has 101.

thanks brotha, do you know if they are leaded or not?

Look for E0. Ethanol is shit.

92 octane E0 is probably more like 95. You can find stations in the area on pure-gas.org

Well worth it, no more crickets either

Race gas?

101 octane unleaded at Shell on Bothell Everett Hwy at Thrasher's Corner (Mill Creek/Bothell) is $11.59/gal available 8am-7pm

Also forgot. Bob has 116 CRT shell racing fuel. Ask him for details.

Out of curiosity, what mods have you done to your car to necessitate a higher octane rating than 91?


Putting race gas in a stock car pretty much just gives you more expensive exhaust fumes.


Scott

Costco does 92oct and is the cheapest gas a good quality. It does have 10% ethanol just like 95% of all gas stations though.

Gotta agree here. Please don't say just to be cool....

Wouldn't it have a greater effect in an engine with higher compression ratios like ours, though?

Not really, and not to the point you'd notice without some extensive tuning and remapping to take advantage of its extra resistance to detonate.

Save your money.

Not as much as you would think.


I'm sure that some of the fine gentlemen representing tuner shops around here can give a much more detailed explanation especially for the FA20 but here is the Sunday School version.


The only real benefit to running a higher octane rating in fuel is for detonation prevention (which most people know). The more you compress an air/fuel mixture the higher the temperature of the combustion charge which is why most high-performance engines need higher octane fuel. That said, you can only take advantage of the higher octane ratings by increasing ignition timing, increasing compression, or forced induction beyond a certain point.


A stock FA20 (even with bolt on's) will only adjust its ignition timing slightly forward or backward depending on feedback from multiple sensors and only up to a point. More dramatic changes to ignition timing, cam timing, fuel injector pulse width, etc can only be achieved by having a proper tune. Simply changing fuel alone won't cut it.


Sure, the ECU may give you a little bit more timing with 93 vs 91, but a stock tune will not adjust itself to run on 95 or higher. Also, if there are any hp gains to be had with 91 vs 93 octane fuel, they would be well within the error variance of most dynos. 100 octane even less so.


Hope that helps.
Scott

Unleaded 101, Leaded 114 and 119?

Shell URT 116 is now discontinued. I have a Unleaded 110 Racing Fuel. Pretty awesome stuff. So is the price per gallon. :)

My question is how are you getting 91 in WA? This is a good question though the more logical answer to using higher octane fuel in our FA20s is that you'll get better performance generally (IAMs will be happier) and it's more of security measure against knock / detonation.

But it is true, past 94 octane, you won't realize any performance gains till you get a tune... And even then, limited in NA formats!

Cheers!


Bob @ Drift-Office, LLC