94 octane fuel gas mileage with sc

Joshuaalpha · 09-14-2004, 08:51 PM

I saw a website that said that u don't get more power from ur car if u have higher octane fuel when u don't need it. u also get horrible gas mileage it says. Well I have the e/m sc, s&s headers, borla exhaust and cai and was wondering what kind of gas mileage u guys were getting. I did an experiment over the last 2 weeks running around in 94 octane fuel and slammed on the gas lesser than usual

. I got 6.2 km\l or 15.5 mpg which is horrible. I have 91 octane fuel in my car and doing same experiment. have any of u boost bros using the higher octane fuel done any experiments like this????? I talked to the guy at e/m who designed the sc and he said that the sc with the cars cpu will give u 5 extra hp\ octane. My car car feels faster with more vrom with the 94 octane. any thoughts on this???? I would appreciate it
Joshuaalpha
North West Boost Bro

Joshuaalpha · 09-15-2004, 04:35 PM

my ses light came on with the 91 octane. hmm????? anyone else have problems with ses coming on with with the sc and headers.

09-15-2004, 04:46 PM

What you NEED to do is run the regular stuff for your car that it is rated for...get on a dyno. Then empty the tank (however you want to) and put in the higher octane. Get back on the dyno.

That is the ONLY way to see a difference in HP. Do not use the "it feels faster" method. Its not accurate and COULD be your head playing mind games.

Schweppe23 · 09-16-2004, 07:43 AM

Put the lower octane in the car....get the engine really heated up hook up some scan tool i.e. autotap, then take the car for some "spirited" runs. While doing this graph your KR. If you see any real KR, then repeat the same steps with a higher octane.

Alkaholik · 09-17-2004, 10:11 AM

I actually get better mileage running on 94 octane w/sc (normal non aggresive driving) as I did before without the sc 87 - 90 octane used. Actually get better mileage with sc about 380 - 400 kms on a tank. Before sc was about 350 if I was lucky.

Joshuaalpha · 09-17-2004, 10:18 AM

well the headers prolly the culprit for lower gas mileage. I slammed on the gas a bit so prob lost alot of gas there.

.

Knappy1 · 09-26-2004, 09:46 AM

I can get as high as 30mpg with highway driving or as low as 16mpg with "spirited" city driving. Varies with different injectors/pullies/pcm, but always stays somewhere around those numbers.

jaketuff · 09-26-2004, 09:35 PM

I usually get around 22-25 MPG highway, and seem to do best on 91 octane, cruising at 75MPH. Most of the time I use 89 octane, and stay away from WOT while commuting. (!)

City traffic punishes my MPG's down to around 18 sometimes, but even with traffic/city, I average 21MPG or so. I can still get 28-30 MPGs if I do all highway driving on a tank.

(No headers, DHP 15% advanced fuel trim, fenderwell CAI, 2.8" pulley, SLP.)

JOUT

Schweppe23 · 09-27-2004, 08:49 AM

Last time i checked my mpg it was 28.1mpg and that was a combination of highway and city and a 1 mile run at 150mph. So my car still gets pretty good gas mileage. I always run a min. of 93 octane.

FORTEEN3GT · 09-28-2004, 07:53 AM

Quote:

Originally Posted by Schweppe23

a 1 mile run at 150mph.

are you nuts? i have taken my car up to 137.....just to make sure DHP was working, then i shut it down...worried about going to jail!

good to know we can hit what the speedo says with a little boost!

Crazytaxi37 · 10-02-2004, 08:34 AM

I run a minumum of 93 octain and maintain 30 mpg highway even w/ f*cking around.

Schweppe23 · 10-02-2004, 07:27 PM

hey crazy who did your s/c shaft and how much did they charge you. i haven't seen you around these parts for a while...hows the car running, got any dyno/times since the blower.

Crazytaxi37 · 10-03-2004, 11:57 PM

Hey man,
The replacement piece was 700 bucks done out of billet this time. Car runs good but needs a computer tune. Running rich right now in the warm weather. Dyno right now is 211 whp 207 wtrq

Crazytaxi37 · 10-05-2004, 11:12 AM

Oop, Sorrry Schweppe. Also, the shaft was done by a local place. The original shaft was actually milled from a sandcast piece. was a POS. Here's the new one.

Joshuaalpha · 10-24-2004, 10:01 AM

with 94 octane my ses light has notcome on at all unlike with 91

Schweppe23 · 10-24-2004, 03:32 PM

what was the code?

Joshuaalpha · 10-24-2004, 05:34 PM

I don't know what the code was. I don't have any scan tools. I disconnected the battery and it went away the first time. and came back a week later when i put 91 octane in the car. and then i put 94 back in and it hasn't come back yet. I think the new headers may have something to do with it

10-24-2004, 08:16 PM

I get 23-25 mpg/highway on 93 or 94 octane and 16-18 city. I drive spirited and could probably do better with practice.

Joshuaalpha · 10-24-2004, 08:18 PM

lately I have been making 1 tank of gas last 2 weeks as long as i don't go driving with my car club on friday nights

Joshuaalpha · 11-04-2004, 05:36 PM

hey did ur guys gas mileage go up with the smaller pulley and dhp??

09-14-2004, 08:51 PM	#1
Joshuaalpha N.W. coast Boost Bro Join Date: Aug 2002 Location: Victoria, B.C Age: 46 Posts: 150 Vehicle: 2002 Grand Am GT Sedan	94 octane fuel gas mileage with sc I saw a website that said that u don't get more power from ur car if u have higher octane fuel when u don't need it. u also get horrible gas mileage it says. Well I have the e/m sc, s&s headers, borla exhaust and cai and was wondering what kind of gas mileage u guys were getting. I did an experiment over the last 2 weeks running around in 94 octane fuel and slammed on the gas lesser than usual . I got 6.2 km\l or 15.5 mpg which is horrible. I have 91 octane fuel in my car and doing same experiment. have any of u boost bros using the higher octane fuel done any experiments like this????? I talked to the guy at e/m who designed the sc and he said that the sc with the cars cpu will give u 5 extra hp\ octane. My car car feels faster with more vrom with the 94 octane. any thoughts on this???? I would appreciate it Joshuaalpha North West Boost Bro

09-15-2004, 04:35 PM	#2
Joshuaalpha N.W. coast Boost Bro Join Date: Aug 2002 Location: Victoria, B.C Age: 46 Posts: 150 Vehicle: 2002 Grand Am GT Sedan	stupid ses my ses light came on with the 91 octane. hmm????? anyone else have problems with ses coming on with with the sc and headers.

09-16-2004, 07:43 AM	#4
Schweppe23 GAGT - Senior Member Join Date: Sep 2002 Location: Ohio Age: 41 Posts: 1,549 Vehicle: Pontiac	Put the lower octane in the car....get the engine really heated up hook up some scan tool i.e. autotap, then take the car for some "spirited" runs. While doing this graph your KR. If you see any real KR, then repeat the same steps with a higher octane. __________________ First 99+ GAGT to run 14s First E/M (only) GA to run 13s First turbo'D GAGT to run 12s 11's coming soon

09-17-2004, 10:18 AM	#6
Joshuaalpha N.W. coast Boost Bro Join Date: Aug 2002 Location: Victoria, B.C Age: 46 Posts: 150 Vehicle: 2002 Grand Am GT Sedan	headers culprit well the headers prolly the culprit for lower gas mileage. I slammed on the gas a bit so prob lost alot of gas there. .

09-26-2004, 09:46 AM	#7
Knappy1 V6ONPSI Join Date: Aug 2002 Location: Mississippi Posts: 373 Vehicle: 2002 SC GT1	I can get as high as 30mpg with highway driving or as low as 16mpg with "spirited" city driving. Varies with different injectors/pullies/pcm, but always stays somewhere around those numbers. __________________ My Supercharged 02 Fast and Sexy...what more could you ask for?

09-15-2004, 04:46 PM	#3
Hexx Guest Posts: n/a	What you NEED to do is run the regular stuff for your car that it is rated for...get on a dyno. Then empty the tank (however you want to) and put in the higher octane. Get back on the dyno. That is the ONLY way to see a difference in HP. Do not use the "it feels faster" method. Its not accurate and COULD be your head playing mind games.

09-17-2004, 10:11 AM	#5
Alkaholik Stock, isn't it??? Join Date: Jun 2003 Location: Mississauga Age: 37 Posts: 134 Vehicle: 2002 GAGT	I actually get better mileage running on 94 octane w/sc (normal non aggresive driving) as I did before without the sc 87 - 90 octane used. Actually get better mileage with sc about 380 - 400 kms on a tank. Before sc was about 350 if I was lucky.

09-26-2004, 09:35 PM	#8
jaketuff GAGT - Senior Member Join Date: Aug 2002 Location: Westchester, NY Age: 43 Posts: 2,093 Vehicle: 2000 Grand Am GT Coupe	I usually get around 22-25 MPG highway, and seem to do best on 91 octane, cruising at 75MPH. Most of the time I use 89 octane, and stay away from WOT while commuting. (!) City traffic punishes my MPG's down to around 18 sometimes, but even with traffic/city, I average 21MPG or so. I can still get 28-30 MPGs if I do all highway driving on a tank. (No headers, DHP 15% advanced fuel trim, fenderwell CAI, 2.8" pulley, SLP.) JOUT __________________ 2000 Pontiac Grand Am GT Coupe Magnacharger SC February 2003 N-body of the Month 14.34 @ 93.38MPH Eaton SC, No ported heads, No Juice! -RETIRED March 2010 w/165k- 2013 Mercedes ML350 !ACHTUNG! Es ist Shtock 2005 Infiniti G35 Coupe : CAI, Manifold Spacer 2004 Pontiac GTO : Mild Mods, and Tuned ... 13.1 @ 107.5 PB 1992 Mustang LX : TT, 351, IC, Alky, Gears - 400HP/500lbs-ft ... MONSTER 1991 Mustang GT : GT40 H/I, Bullitt Wheels, New Paint

09-27-2004, 08:49 AM	#9
Schweppe23 GAGT - Senior Member Join Date: Sep 2002 Location: Ohio Age: 41 Posts: 1,549 Vehicle: Pontiac	Last time i checked my mpg it was 28.1mpg and that was a combination of highway and city and a 1 mile run at 150mph. So my car still gets pretty good gas mileage. I always run a min. of 93 octane. __________________ First 99+ GAGT to run 14s First E/M (only) GA to run 13s First turbo'D GAGT to run 12s 11's coming soon

10-02-2004, 08:34 AM	#11
Crazytaxi37 GAGT - Member Join Date: Oct 2002 Location: Wisconsin Age: 48 Posts: 67 Vehicle: AED/SC-T Alero	I run a minumum of 93 octain and maintain 30 mpg highway even w/ f*cking around.

10-02-2004, 07:27 PM	#12
Schweppe23 GAGT - Senior Member Join Date: Sep 2002 Location: Ohio Age: 41 Posts: 1,549 Vehicle: Pontiac	hey crazy who did your s/c shaft and how much did they charge you. i haven't seen you around these parts for a while...hows the car running, got any dyno/times since the blower. __________________ First 99+ GAGT to run 14s First E/M (only) GA to run 13s First turbo'D GAGT to run 12s 11's coming soon

10-03-2004, 11:57 PM	#13
Crazytaxi37 GAGT - Member Join Date: Oct 2002 Location: Wisconsin Age: 48 Posts: 67 Vehicle: AED/SC-T Alero	Hey man, The replacement piece was 700 bucks done out of billet this time. Car runs good but needs a computer tune. Running rich right now in the warm weather. Dyno right now is 211 whp 207 wtrq

10-05-2004, 11:12 AM	#14
Crazytaxi37 GAGT - Member Join Date: Oct 2002 Location: Wisconsin Age: 48 Posts: 67 Vehicle: AED/SC-T Alero	Oop, Sorrry Schweppe. Also, the shaft was done by a local place. The original shaft was actually milled from a sandcast piece. was a POS. Here's the new one. Attached Thumbnails

10-24-2004, 10:01 AM	#15
Joshuaalpha N.W. coast Boost Bro Join Date: Aug 2002 Location: Victoria, B.C Age: 46 Posts: 150 Vehicle: 2002 Grand Am GT Sedan	with 94 octane my ses light has notcome on at all unlike with 91

10-24-2004, 03:32 PM	#16
Schweppe23 GAGT - Senior Member Join Date: Sep 2002 Location: Ohio Age: 41 Posts: 1,549 Vehicle: Pontiac	what was the code? __________________ First 99+ GAGT to run 14s First E/M (only) GA to run 13s First turbo'D GAGT to run 12s 11's coming soon

10-24-2004, 05:34 PM	#17
Joshuaalpha N.W. coast Boost Bro Join Date: Aug 2002 Location: Victoria, B.C Age: 46 Posts: 150 Vehicle: 2002 Grand Am GT Sedan	I don't know what the code was. I don't have any scan tools. I disconnected the battery and it went away the first time. and came back a week later when i put 91 octane in the car. and then i put 94 back in and it hasn't come back yet. I think the new headers may have something to do with it

10-24-2004, 08:16 PM	#18
MetaGTP1 Guest Posts: n/a	I get 23-25 mpg/highway on 93 or 94 octane and 16-18 city. I drive spirited and could probably do better with practice.

10-24-2004, 08:18 PM	#19
Joshuaalpha N.W. coast Boost Bro Join Date: Aug 2002 Location: Victoria, B.C Age: 46 Posts: 150 Vehicle: 2002 Grand Am GT Sedan	lately I have been making 1 tank of gas last 2 weeks as long as i don't go driving with my car club on friday nights

11-04-2004, 05:36 PM	#20
Joshuaalpha N.W. coast Boost Bro Join Date: Aug 2002 Location: Victoria, B.C Age: 46 Posts: 150 Vehicle: 2002 Grand Am GT Sedan	hey did ur guys gas mileage go up with the smaller pulley and dhp??

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