100 Octane Usage
Super Member
Joined: Mar 2015
Posts: 663
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From: Bucks Cty, PA
2015 gl450
Because a) I don't get to the track much, it's 2.5hrs away if I'm lucky with traffic, and like to run my best every run; b) If you've ever been to Atco or ETown here in the Northeast, you know that runs are precious as you only get a few; and c) because this Thu is a grudge match against my old friend in his Mitsu GSX running mid-11's, and I have to make every run count for bragging rights 
I'm there, especially atco, often. If I see a black c63, I'll be sure to say hi.
MBWorld Fanatic!
Joined: Jun 2008
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From: Los Angeles
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
MBWorld Fanatic!
Joined: Jun 2008
Posts: 8,074
Likes: 2,867
From: Los Angeles
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Not to be argumentative, but, even though times do not lie, you really can't claim that results on a given day/conditions and a result of a 3mph gain is consistent with switching gas.
I have ran the same car, back to back without changing a darn thing, and gotten different times/speeds...an awesome launch vs. a good launch again can yield differences of 0.2-0.4 seconds and traps of 3-5mph...
Just my 2 cents.
Carry on.
I have ran the same car, back to back without changing a darn thing, and gotten different times/speeds...an awesome launch vs. a good launch again can yield differences of 0.2-0.4 seconds and traps of 3-5mph...
Just my 2 cents.
Carry on.
Exactly. ET is generally down to the driver. Trap should almost always be the same, given similar conditions. Especially on a NA car.
Super Member
Joined: Mar 2015
Posts: 663
Likes: 49
From: Bucks Cty, PA
2015 gl450
The weather tonight has other plans. I'll PM you next time I'm heading over.
Where did you live?
Last edited by Mike450; Jun 30, 2015 at 03:47 PM.
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Joined: Jan 2015
Posts: 115
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2007 civic Si 2004 Acura TL 2013 MB C350
to my knowledge if you pump 100 best thing to do to get the full benefit is to disconnect your battery and reconnect it then let ure car idle to read new parameters then it's gonna get the full stock benefit from 93-100 and our butt dynos worked well from whence we use to have our track days.... try that guys
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Joined: Oct 2014
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W204 C63 Bone Stock; E36 M3 Supercharged 400WHP; X5 parts eater
I put in 17 gallons of Sunoco 260 GT. All I gotta say is it's a TUNE in a bottle. Before, third gear seems to run out of gas at 5500 rpm and the shift to 4th was a very welcome change to get another wave of power. Now third gear feels good till red line and a shift to fourth is almost an imperceptible change in power.
Yeah not scientific, but I enjoy my cars by the way I feel it.
Yeah not scientific, but I enjoy my cars by the way I feel it.
Last edited by Gerry_M; Jul 11, 2015 at 02:11 AM.
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Joined: Jan 2014
Posts: 122
Likes: 2
C63
I would welcome 100 octane gas. We supposedly have 93 octane all over the place but even on Shell tier three gasoline I can hear pinging sometimes.
We have 93 octane with no ethanol but quite high priced. that is what we put in most of the time, locally. I don't think it has a very good additive package though.
I always put a splash of octane booster in the tank.
Sometimes the whole bottle and you can tell the difference
We have 93 octane with no ethanol but quite high priced. that is what we put in most of the time, locally. I don't think it has a very good additive package though.
I always put a splash of octane booster in the tank.
Sometimes the whole bottle and you can tell the difference
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Joined: Oct 2014
Posts: 150
Likes: 1
W204 C63 Bone Stock; E36 M3 Supercharged 400WHP; X5 parts eater
Octane boosters usually says that they will raise your octane by 5 points. Remember though a point is 0.1 octane. So 5 points is 0.5 octane raise. So if adding a booster to 91 octane, you get 91.5
