6MPG Fuel Economy Difference In Using Regular vs. Premium!? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

honor first · 10-28-2013, 09:19 PM

Read a lot of threads about what type of fuel to use, etc, but nothing that mentioned anything like this:
http://www.fueleconomy.gov/feg/Power...ro&srchtyp=ymm

I am assuming it is some sort of error; no way there is a 6MPG difference in regular vs. premium. I only run premium in my 6MT SS, but figured I'd see ya'lls thoughts on this. I am getting the 18MPG listed on the website on the highway daily.

wakespeak · 10-28-2013, 09:29 PM

Seems like it is reversed of what normally happens regular vs premium. Would not be surprised if data is wrong ie switched. Chevy might have an ECU map for regular that is totally fuel economy oriented thinking those customers are more concerned with cost. I get 16-18 combined mostly city on premium. I easily get well into the 20s on the highway, and your 5th and 6th gears have the same overall ratio as the SS.

Edit: the manual premium mpg must be for the ZL1, possibly the Z28. This is a data screw up.

honor first · 10-28-2013, 09:52 PM

yeah my SS cant crack 20 over 60mph, but idk what speeds they determine highway fuel economy at; probably some BS like 55MPH which are city road speeds here. oh well.

*DGthe3* · 11-02-2013, 03:39 PM

The first 2 V8s are for the SS, the other two are for the ZL1 (as indicated by the word 'supercharged' in the descriptor)

The fuel type listed is only the minimum required according to the manufacturer, the cars are tested with the recommended fuel type (which in the case of the SS is premium).

Honor First, how long have you had your '14, is it still in the first couple thousand miles? Fuel economy is usually poor for the first little while.

honor first · 11-02-2013, 04:01 PM

Quote:

Originally Posted by DGthe3

The first 2 V8s are for the SS, the other two are for the ZL1 (as indicated by the word 'supercharged' in the descriptor)

The fuel type listed is only the minimum required according to the manufacturer, the cars are tested with the recommended fuel type (which in the case of the SS is premium).

Honor First, how long have you had your '14, is it still in the first couple thousand miles? Fuel economy is usually poor for the first little while.

10-4, cant believe i missed that detail.

i am under 2K miles. Im not complaining about my mileage, but we'll see if it gets better. <18 highway at lower speeds, ~65

PalmerGA · 11-02-2013, 04:28 PM

Quote:

Originally Posted by honor first

<18 highway at lower speeds, ~65

That sounds pretty bad... do you cruise in 4th or 5th or something? I would think you should at least be at 21.

*DGthe3* · 11-02-2013, 04:31 PM

Quote:

Originally Posted by PalmerGA

That sounds pretty bad... do you cruise in 4th or 5th or something? I would think you should at least be at 21.

His car is still new though, in a little while it should improve a bit. I think most people tend see an increase sometime in the 2-3k mile range.

SlingShot · 11-02-2013, 05:20 PM

My 2010 SS LS3 (for sale by the way) get 26mpg @70 mph on the highway ... And around 14mpg in the city when I keep my foot out of it.

My ZL1 on the other hand gets 19mpg on the highway and 13 city, when driving like a normal person.

christianchevell · 11-02-2013, 05:22 PM

24-25mpg at 75-80 all day long in a m6 SS.........

jd10013 · 11-02-2013, 05:33 PM

Quote:

Originally Posted by honor first

yeah my SS cant crack 20 over 60mph, but idk what speeds they determine highway fuel economy at; probably some BS like 55MPH which are city road speeds here. oh well.

a little higher I think, 60-65. after that wind resistance and drag start to drive efficiency down

honor first · 11-02-2013, 06:48 PM

idk guys, dont cruise in 4th or 5th, i set cruise at 65mph dead on every day and go, and the road is 99% flat except for going up when the highway becomes an overpass.

Quote:

Originally Posted by christianchevell

24-25mpg at 75-80 all day long in a m6 SS.........

DagoCountyGee · 11-02-2013, 07:26 PM

I get 2 mpg difference in my v6.

GroundhogSS · 11-02-2013, 07:40 PM

Quote:

Originally Posted by SlingShot

My 2010 SS LS3 (for sale by the way) get 26mpg @70 mph on the highway ... And around 14mpg in the city when I keep my foot out of it.

My ZL1 on the other hand gets 19mpg on the highway and 13 city, when driving like a normal person.

Please define normal person. I don't know too many of those. Especially among car guys.

gutterball · 11-02-2013, 09:00 PM

Your comparing apples to orange, the V8 with Super was a Supercharger, The V8 with Reg was not. I tried several time between reg and Hi-test and always got more with Hi-test, but just a little more about a mile more.

10-28-2013, 09:19 PM	#1
honor first MURICA! Drives: 2014 2SS 1LE Join Date: Sep 2013 Location: RGV, Texas Posts: 459	6MPG Fuel Economy Difference In Using Regular vs. Premium!? Read a lot of threads about what type of fuel to use, etc, but nothing that mentioned anything like this: http://www.fueleconomy.gov/feg/Power...ro&srchtyp=ymm I am assuming it is some sort of error; no way there is a 6MPG difference in regular vs. premium. I only run premium in my 6MT SS, but figured I'd see ya'lls thoughts on this. I am getting the 18MPG listed on the website on the highway daily. __________________ *Pro Amore Patriae* God gave three gifts to man; dogs, women, and the LS motor. 2014 Camaro 2SS 6MT RS 1LE Black on Black AFE Intake, Stainless Power Headers + HFC, BadlanzHPE Electric Cutouts. 315/275 Nittos, Wheels. Debadged, Cosmetic Mods, Sound System, More

10-28-2013, 09:52 PM	#3
honor first MURICA! Drives: 2014 2SS 1LE Join Date: Sep 2013 Location: RGV, Texas Posts: 459	yeah my SS cant crack 20 over 60mph, but idk what speeds they determine highway fuel economy at; probably some BS like 55MPH which are city road speeds here. oh well. __________________ *Pro Amore Patriae* God gave three gifts to man; dogs, women, and the LS motor. 2014 Camaro 2SS 6MT RS 1LE Black on Black AFE Intake, Stainless Power Headers + HFC, BadlanzHPE Electric Cutouts. 315/275 Nittos, Wheels. Debadged, Cosmetic Mods, Sound System, More

11-02-2013, 03:39 PM	#4
DGthe3 Moderator.ca Drives: 05 Grand Am GT Join Date: Jul 2007 Location: Niagara, Canada Posts: 25,366	The first 2 V8s are for the SS, the other two are for the ZL1 (as indicated by the word 'supercharged' in the descriptor) The fuel type listed is only the minimum required according to the manufacturer, the cars are tested with the recommended fuel type (which in the case of the SS is premium). Honor First, how long have you had your '14, is it still in the first couple thousand miles? Fuel economy is usually poor for the first little while. __________________ Note, if I've gotten any facts wrong in the above, just ignore any points I made with them __________________ Originally Posted by FbodFather My sister's dentist's brother's cousin's housekeeper's dog-breeder's nephew sells coffee filters to the company that provides coffee to General Motors...... ........and HE WOULD KNOW!!!! __________________ Camaro Fest sub-forum

11-02-2013, 05:20 PM	#8
SlingShot Drives: 2012 ZL1 - #670 Join Date: Jun 2009 Location: Seminole, Fl. Posts: 8,009	My 2010 SS LS3 (for sale by the way) get 26mpg @70 mph on the highway ... And around 14mpg in the city when I keep my foot out of it. My ZL1 on the other hand gets 19mpg on the highway and 13 city, when driving like a normal person. __________________

11-02-2013, 05:22 PM	#9
christianchevell old school chevy rodder Drives: 2021 zl1 a-10 WildCherry Join Date: Jul 2012 Location: Oregon Posts: 5,622 View My Garage	24-25mpg at 75-80 all day long in a m6 SS......... __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data,Red Carbon Interior, Nav, RotoFab Big Gulp , Elite x2ultra, Borla ATAK, Driveshaft shop, BMR susp, Speed covers, intercoolers, ATI , 2650 MAG, DSX lid, 103 NW, TSP Longtubes & cats, LPE, 1le mods, ,LME cover, Katech pump and chain, Trunnions, BTR stage 2, LPE boostapump, Gforce, Speed eng , Granetteli, etc etc

10-28-2013, 09:29 PM	#2
wakespeak Drives: 2020 ZL1 1LE Join Date: Sep 2012 Location: Austin, Texas Posts: 1,377	Seems like it is reversed of what normally happens regular vs premium. Would not be surprised if data is wrong ie switched. Chevy might have an ECU map for regular that is totally fuel economy oriented thinking those customers are more concerned with cost. I get 16-18 combined mostly city on premium. I easily get well into the 20s on the highway, and your 5th and 6th gears have the same overall ratio as the SS. Edit: the manual premium mpg must be for the ZL1, possibly the Z28. This is a data screw up.

11-02-2013, 07:26 PM	#12
DagoCountyGee Drives: '15 SS Join Date: Sep 2012 Location: North County Posts: 1,233	I get 2 mpg difference in my v6.

11-02-2013, 09:00 PM	#14
gutterball Drives: 2014 1LS M6 Supercharged Join Date: Feb 2011 Location: New Britain, Ct Posts: 937 View My Garage	Your comparing apples to orange, the V8 with Super was a Supercharger, The V8 with Reg was not. I tried several time between reg and Hi-test and always got more with Hi-test, but just a little more about a mile more.