MPG - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Mikes SS · 04-05-2012, 04:08 PM

So OK I almost want to wave the BS Flag on myself, but I can't believe this situation so I am here for anyone to offer some perspective. Last week my wife accidentally put 87 in my car and I have always and only put 93 in it since I have been the proud owner back in June of '09. I usually range from 12.3 to 12.5 MPG doing my DD back and forth to work. I expect to fill up every Sunday so I don't have to fool with it Monday Morning. So this past Sunday rolls around and I am thinking crap I forgot to get gas and sure enough go out to the car and I have a little over a 1/4 left in it. So as I usually do after I pump the gas I look at the DIC and it shows 16.4 average? I am thinking WTF? Same driving and it says I still have 85 miles left to go in the tank?? How in the world could it be possible to get better gas mileage on 87 and I have been putting in 93 all along which is more expensive and I get better results from a cheaper priced gas? Let me hear your answers!! Got 16,500 on the ODO and really didn't to drive it much early on in its life due to a military deployment. Just extra info..

Fast Motorsports · 04-05-2012, 04:53 PM

You sure your driving habits did not change knowing you had 87 in the tank and were being extra nice to the car?

Mikes SS · 04-05-2012, 05:35 PM

Well I can see your point in that but I drive the car like it was intended to be driven!!

OBSSEST · 04-06-2012, 04:57 PM

Your 12.3 to 12.5 on 93 is pretty bad. Do you always buy it from the same place?

If so, maybe the 93 you usually buy is really poor quality.

Burton · 04-06-2012, 08:30 PM

Not the same car but my wifes X-3 BMW also did better on the lower octane gas. And it was the dealerships mechanic who told her it would do better with the lower octane. We drove from MASS to Florida, going down we used 93, coming back up we used 87. And it came out to around 4-5 miles per gallon better with the 87.

gotroost · 04-06-2012, 09:19 PM

Hmm... Check yours and hers driving habits. When I can talk my wife into driving mine she drives like a little old lady since since knows how much I love it and she doesn't want to hurt it.

Also, might have something to do with the octane tables. Fuse pull and good gas might burn more.

was619 · 07-03-2012, 08:21 PM

I have been on a road trip for the past few days visiting family and have been filling up on 93 only. I have noticed that the slight difference in driving style on the highway and obviously speed a huge part in the difference between getting 22 and 28.5mpg. I alike to you would like to fill up my next tank on 87 to see if it increases at all over the returning trip.
Interesting info here. Does your car have a tune on it or stock because that would also make a huge difference
Later, Will

JANNETTYRACING · 07-04-2012, 08:34 AM

Quote:

Originally Posted by Mikes SS

So OK I almost want to wave the BS Flag on myself, but I can't believe this situation so I am here for anyone to offer some perspective. Last week my wife accidentally put 87 in my car and I have always and only put 93 in it since I have been the proud owner back in June of '09. I usually range from 12.3 to 12.5 MPG doing my DD back and forth to work. I expect to fill up every Sunday so I don't have to fool with it Monday Morning. So this past Sunday rolls around and I am thinking crap I forgot to get gas and sure enough go out to the car and I have a little over a 1/4 left in it. So as I usually do after I pump the gas I look at the DIC and it shows 16.4 average? I am thinking WTF? Same driving and it says I still have 85 miles left to go in the tank?? How in the world could it be possible to get better gas mileage on 87 and I have been putting in 93 all along which is more expensive and I get better results from a cheaper priced gas? Let me hear your answers!! Got 16,500 on the ODO and really didn't to drive it much early on in its life due to a military deployment. Just extra info..

87 octane fuel is the same no matter where you buy it and it has the highest turnover rate so it is always Fresh.

93 can be all over the place, Stale, Mixed with 87, so you need to select a station that is very busy and sells the most fuel in your area.

Also if the car is not tuned it could be stuck on the low octane table.

If running high octane with low timing will result in low fuel mileage.

High Octane requires High timing to be efficient.

Ted.

redredrage · 07-04-2012, 12:23 PM

I've heard of people getting better mileage with regular due to being on the low octane table.

I suggest 5 gallons of e85 with 10 to 11 gallons of midgrade. Runs a 7 % fuel trim at wot with about 27 degrees of timing.

cmore · 07-06-2012, 05:49 PM

I used to run 93 oct but tried 89 and can tell no difference in mpg. I have done the fuse pull on several occasions and can't tell a difference there either.

redredrage · 07-07-2012, 11:49 AM

Quote:

Originally Posted by cmore

I used to run 93 oct but tried 89 and can tell no difference in mpg. I have done the fuse pull on several occasions and can't tell a difference there either.

Do you get any hesitation ? I would always feel a slight jerk on heavy acceleration between 2000 and 4000rpm and noticeably less strong.

BTW some gas stations dump premium into mid grade if it doesent sell quick enough and mid into regular

04-05-2012, 04:08 PM	#1
Mikes SS Drives: '10 CGM 2SS/RS 6M Join Date: Oct 2009 Location: North Central Florida Posts: 1,032 View My Garage	MPG So OK I almost want to wave the BS Flag on myself, but I can't believe this situation so I am here for anyone to offer some perspective. Last week my wife accidentally put 87 in my car and I have always and only put 93 in it since I have been the proud owner back in June of '09. I usually range from 12.3 to 12.5 MPG doing my DD back and forth to work. I expect to fill up every Sunday so I don't have to fool with it Monday Morning. So this past Sunday rolls around and I am thinking crap I forgot to get gas and sure enough go out to the car and I have a little over a 1/4 left in it. So as I usually do after I pump the gas I look at the DIC and it shows 16.4 average? I am thinking WTF? Same driving and it says I still have 85 miles left to go in the tank?? How in the world could it be possible to get better gas mileage on 87 and I have been putting in 93 all along which is more expensive and I get better results from a cheaper priced gas? Let me hear your answers!! Got 16,500 on the ODO and really didn't to drive it much early on in its life due to a military deployment. Just extra info..

04-06-2012, 08:30 PM	#5
Burton Upgrade fever Drives: V6 Join Date: Dec 2010 Location: Earth Posts: 257	Not the same car but my wifes X-3 BMW also did better on the lower octane gas. And it was the dealerships mechanic who told her it would do better with the lower octane. We drove from MASS to Florida, going down we used 93, coming back up we used 87. And it came out to around 4-5 miles per gallon better with the 87. __________________ F-4E Phantom-57th AGS Phantom AMU Upgrades--RX catch can/Leather steering wheel/leather shift knob/4 pack gauge cluster/Painted stripes/Painted Bowtie's/Technostalgia tail lights/ZL1 spoiler/Painted steering wheel bezel/Painted speedometer bezel/Duel Halo's/Transformers Front Fascia Blackout Last edited by Burton; 04-07-2012 at 06:47 PM.

04-06-2012, 09:19 PM	#6
gotroost Drives: 2021 Crush ZL1 1LE Join Date: Oct 2009 Location: Sierra Vista, AZ Posts: 1,119 View My Garage	Hmm... Check yours and hers driving habits. When I can talk my wife into driving mine she drives like a little old lady since since knows how much I love it and she doesn't want to hurt it. Also, might have something to do with the octane tables. Fuse pull and good gas might burn more. __________________ 2021 Crush ZL1 1LE

07-03-2012, 08:21 PM	#7
was619 Billy The Kid Drives: Cyber Grey 2SS/RS Join Date: Jun 2009 Location: North Alabama Posts: 637	I have been on a road trip for the past few days visiting family and have been filling up on 93 only. I have noticed that the slight difference in driving style on the highway and obviously speed a huge part in the difference between getting 22 and 28.5mpg. I alike to you would like to fill up my next tank on 87 to see if it increases at all over the returning trip. Interesting info here. Does your car have a tune on it or stock because that would also make a huge difference Later, Will __________________ CGM 2SS/RS[SIZE="1"] Performance: LT Headers/Stainless Works cat-back, 225/233 Cam, 1LE 3.91 gears, Custom Tune, BMR suspension, MGW Shifter, Stainless brake & clutch lines, Ideal G Master Cylinder, 275s on all 4 corners Aesthetics: ZL1 Spoiler, DIY LED marker lights, AACPlasma DRL, Yellow Calipers, painted factory wheels

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04-05-2012, 04:53 PM	#2
Fast Motorsports Drives: Camaro Join Date: Dec 2011 Location: Woodstock, IL Posts: 27	You sure your driving habits did not change knowing you had 87 in the tank and were being extra nice to the car?

04-05-2012, 05:35 PM	#3
Mikes SS Drives: '10 CGM 2SS/RS 6M Join Date: Oct 2009 Location: North Central Florida Posts: 1,032 View My Garage	Well I can see your point in that but I drive the car like it was intended to be driven!!

04-06-2012, 04:57 PM	#4
OBSSEST Drives: 2010 Camaro 2SS RS, Black Join Date: Sep 2009 Location: Sacramento Posts: 413	Your 12.3 to 12.5 on 93 is pretty bad. Do you always buy it from the same place? If so, maybe the 93 you usually buy is really poor quality.

07-04-2012, 12:23 PM	#9
redredrage Drives: 2010 Camaro SS manual all stock Join Date: Jun 2012 Location: Royal Oak, MI Posts: 160	I've heard of people getting better mileage with regular due to being on the low octane table. I suggest 5 gallons of e85 with 10 to 11 gallons of midgrade. Runs a 7 % fuel trim at wot with about 27 degrees of timing.

07-06-2012, 05:49 PM	#10
cmore Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010 Location: West Tn Posts: 628	I used to run 93 oct but tried 89 and can tell no difference in mpg. I have done the fuse pull on several occasions and can't tell a difference there either.