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It turns out a gas station pretty close to my house sells 100 octane. Any of you guys try it out? Seems like its worth trying for at least 1 tank. A friend tells me he really notices it in his Mustang GT.
Not sure of the cost yet. I can update later. Likely $5.00 to $6.00
The factory ecu are programmed to use 87 oct to 93 oct. Racing gas will not offer performance advantage unless the ecu is retuned to use the racing gas.
Hi, are you sure it is 100 Octane petrol? Because it is most likely just a regular US 93 with additives. I doubt they sell racing fuel at a gas station, in which case it would be quite rare and would probably cost more.
EU ratings are 95/98, which are equivalent to US ratings of 91/93.
So, EU 95 octane = US 91 octane and EU 98 octane = US 93 octane.
In Europe, you can buy 100 or 102 Octane fuel which is nothing but a marketing name for a 98 (93 US) with additives.
It turns out a gas station pretty close to my house sells 100 octane. Any of you guys try it out? Seems like its worth trying for at least 1 tank. A friend tells me he really notices it in his Mustang GT.
Not sure of the cost yet. I can update later. Likely $5.00 to $6.00
Unless your tuned for it, I don't think it will make much difference. I have tried multiple race fuels with no change in performance. + / - a tenth in any measurement.
Hi, are you sure it is 100 Octane petrol? Because it is most likely just a regular US 93 with additives. I doubt they sell racing fuel at a gas station, in which case it would be quite rare and would probably cost more.
EU ratings are 95/98, which are equivalent to US ratings of 91/93.
So, EU 95 octane = US 91 octane and EU 98 octane = US 93 octane.
In Europe, you can buy 100 or 102 Octane fuel which is nothing but a marketing name for a 98 (93 US) with additives.
Top performance EU 98 octane = 93 US octane.
Well, I confirmed. It is legit 100 US octane fuel. What's that? about 106 in GB? lol
As I mentioned in the OP, of course it's more expensive. I just called them and it's higher than I thought. $8.09 USD/gallon. But that's about what you guys pay for regular gas in Europe isn't it? LOL
I am actually getting the AMS Alpha tune very soon. So in theory I could have them map it for 100 octane. But then I would be reliant on that gas forever! Not good. Wouldn't it be awesome if they could tune the ECU and have some type of peripheral switch to throw for which gas is used?
I am actually getting the AMS Alpha tune very soon. So in theory I could have them map it for 100 octane. But then I would be reliant on that gas forever! Not good. Wouldn't it be awesome if they could tune the ECU and have some type of peripheral switch to throw for which gas is used?
Map switching would be cool for sure. At this point you will need 3 ECU's! I am interested in e85 too? It makes good power on other platforms.
Actually, I saw about 26rwhp increase on a dyno after adding about 5 gallons of 104 octane to my quarter tank on a RennTech tuned car. Drove the car for about 4-5 mins on the dyno after adding the fuel and made a few pulls
‘17 Carrera GTS, ‘16 E63 Estate, 1965 Shelby Cobra and a few more
Originally Posted by Jan AMG
Hi, are you sure it is 100 Octane petrol? Because it is most likely just a regular US 93 with additives. I doubt they sell racing fuel at a gas station, in which case it would be quite rare and would probably cost more.
EU ratings are 95/98, which are equivalent to US ratings of 91/93.
So, EU 95 octane = US 91 octane and EU 98 octane = US 93 octane.
In Europe, you can buy 100 or 102 Octane fuel which is nothing but a marketing name for a 98 (93 US) with additives.
Top performance EU 98 octane = 93 US octane.
Yes, it is sold for “off road use only”. I can get it at a station close to my house, $8 a gallon. My Cobra will run on it, small block 427 with no electronics other than the ignition system. I notice quite a difference in the winter when CA winter blend gas (more benzene) causes me problems. This is a carburated engine, I wouldn’t bother running it in my AMG or my Porsche.
Haven't run it in the W212 (yet), but would in a heartbeat if I found it near the house. When I was living in DFW there were a few Exxon stations that carried 100-octane unleaded cause of smaller municipal airports nearby & I'd fill up the zx-10r anytime I was nearby. It puts down 160whp on 93-octane & showed noticeable gains even being N/A.
It turns out a gas station pretty close to my house sells 100 octane. Any of you guys try it out? Seems like its worth trying for at least 1 tank. A friend tells me he really notices it in his Mustang GT.
Not sure of the cost yet. I can update later. Likely $5.00 to $6.00
race gas if tuned for it is a huge hp tq gainer...
on 105 octane race gas I got 93 whtq 41whp (from 91)
now our cars can retard/advance ignition timing for + - 2-3 octane...so if u mix it right to be around 95 octane u would gain a little power. Keep in mind most racegas is leaded which is going to kill ur Oxygen sensors...if its not leaded look up a formula to mix it up to 95 octane or get some boostane...it works...better yet get a race gas tune 😁
You do not need a race gas tune for a 4200-4500lb family sled.
The ECU adapts to race gas within 3 or 4 WOT runs. Just be careful when you go back to regular gas and allow the ECU to adapt back or you will get misfire galore with anything approaching half throttle.
05-08-2018, 11:29 AM
