View Poll Results: whats your MPG
27-31
55
25.94%
20-26
81
38.21%
12-20
76
35.85%
Voters: 212. You may not vote on this poll
How many getting close to 31MpG
TECH Apprentice
Joined: Feb 2002
Posts: 364
Likes: 0
From: Chicago; South Side
My car will come our of storage when the snow melts, around mid-April. I'll take your MPG test, but I can handle math. I agree about your 30 MPG comments. You get 30 MPG, you don't deserve these cars. I have a 4 banger '97 Ganda Am that gets 30 mpg on the highway and about 26 combined. I'm also venture a guess that the 30 mpg guy only have 6 spark plugs. Counting may be the math problem. 
My 99 Formula got 31 mpg highway with the windows up and AC on. I drove it up to my camp and back without driving too aggressively at an average speed of about 45mph. This was a 6M 3.23 with a lid and K&N.
My GTP would get 32+mpg on the same trip with a 3200 stall converter, XP cam, headers and exaust.
My GTP would get 32+mpg on the same trip with a 3200 stall converter, XP cam, headers and exaust.
11 Second Club
iTrader: (14)
Joined: Nov 2004
Posts: 1,653
Likes: 1
From: Michigan (Macomb or Lansing)
I get 11-15 city in my t/a. 21 highway. This is a cammed ls1, m6, 3.42, boltons.
My Z/28 gets about the same with an a4, stock lt1, couple boltons, 2.73s.
What gives?
My Z/28 gets about the same with an a4, stock lt1, couple boltons, 2.73s.
What gives?
11 Second Club
Joined: Jan 2007
Posts: 187
Likes: 0
From: Pusan, ROK
I got 12.6 mpg in mixed driving taking it easy on the car w/ stock heads and a big cam. This was at about 126,000 miles. I probably get closer to 10 mpg the way that I normally drive. Not sure on highway only...
damn guys I could beat the **** out of my car daily and still pull better than 10-12 you guys are showing 
in normal mixed driving I pull anywhere from 19-22mpg depending on how much I play with it. On a highway trip I pull 24-25...this is with all the mods in my sig on an A4 with 3500 stall and 3:42's. With an M6 I have no doubt I could pull 27+ on a highway trip.
BTW Mixed driving in Charlotte consists of regularly going from 80mph to 20mph in about 3 seconds, then back up
Anyone from Charlotte knows what i'm talking about...
in normal mixed driving I pull anywhere from 19-22mpg depending on how much I play with it. On a highway trip I pull 24-25...this is with all the mods in my sig on an A4 with 3500 stall and 3:42's. With an M6 I have no doubt I could pull 27+ on a highway trip.
BTW Mixed driving in Charlotte consists of regularly going from 80mph to 20mph in about 3 seconds, then back up
Anyone from Charlotte knows what i'm talking about... LS1 Tech Stories
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I'm mostly stock for now (M6), but I average about 18-20 with mostly city driving. I have posted a 29 mpg tank a couple times, but that was mostly highway/interstate driving. Those that are screaming BS have obviously never tried setting the cruise control on long trips before dumping thousands of dollars in go-fast parts into your car. Is ~30 mpg a reasonable average? Hell no. Is it possible to get on highway trips? Yes, it is.
I am planning on spreadsheeting all my fill-ups this year, tracking my mileage, gallons purchased, and price - all for the entire year, in an attempt to see how much my car is costing me in gas. If there is enough interest, I can post up the spreadsheet sometime this summer (after acquiring some data, and log some highway travel).
I am planning on spreadsheeting all my fill-ups this year, tracking my mileage, gallons purchased, and price - all for the entire year, in an attempt to see how much my car is costing me in gas. If there is enough interest, I can post up the spreadsheet sometime this summer (after acquiring some data, and log some highway travel).
When I got my 30 mpg I was doing 60-65 in 6th gear the whole way. I think I had to slow down a little once (maybe to 50 or so) because of slow traffic, but it was only for like 30 seconds, then I got back up to speed.
Launching!
Joined: Mar 2006
Posts: 285
Likes: 0
From: Indianapolis, IN
DANOZ28 wrote:
PROVE IT !!!!!!!! fill her up and post your odometer milage right friggin here! then drive around untill your empty and fill her up at the same pump /station. then post milage and gallons so WE right here can calculate your milage. i believe everyone of you 30 mpg people failed math class! i've requested this twice before and NO ONE steps up to prove me wrong. i wonder why, hmmm?
PROVE IT !!!!!!!! fill her up and post your odometer milage right friggin here! then drive around untill your empty and fill her up at the same pump /station. then post milage and gallons so WE right here can calculate your milage. i believe everyone of you 30 mpg people failed math class! i've requested this twice before and NO ONE steps up to prove me wrong. i wonder why, hmmm?
29.2 MPG on a trip from IN to NJ with the AC on and two passengers + luggage. I can easily believe cars getting 30 or even better without using AC and with no passengers. LS1 + M6 makes a great daily driver.
I have every drop of gas I've put in my car since it rolled off the trailer in NY 1 1/2 years ago. So anyone who wants proof, I've got it. I've gotten 29 once, and 30 twice, haven
t really taken it on many road trips
t really taken it on many road trips
I keep track of my mileage at every fill up and got some actual numbers for ya.
Best overall tank I've ever had 327 miles / 14.691 gallons at fill up = 22.25 mpg
Worst overall tank I've ever had 285 miles / 14.912 gallons at fill up = 19.11 mpg
Both of these tanks were a mix of city and highway with some romping and stomping mixed in between. -100% stock 02 Z28 M6
Best overall tank I've ever had 327 miles / 14.691 gallons at fill up = 22.25 mpg
Worst overall tank I've ever had 285 miles / 14.912 gallons at fill up = 19.11 mpg
Both of these tanks were a mix of city and highway with some romping and stomping mixed in between. -100% stock 02 Z28 M6
LOL at all the 
in this thread. It's not like anyone is claiming 500rwhp with a cam and bolt-ons. Instead, all the complaining is whether or not anyone can achieve results that are only 10% better than the manufacturers rating for fuel economy.
Original EPA Rating for 5.7L M6 - 19/28
Capable? Yes - as reported by many who have responded (27% over 27mpg, out of 170 responses at this writing)
Knocking down 30+ every time? No, not a single person has claimed that
Sorry, I've got better things to do than burn a $50 bill and four hours trying to prove you wrong. I'm pretty confident in my ability to work over a calculator to figure compression ratios and valve events, so MPG is a cake walk. Since you are questioning how well we can handle the math, now might be a good time for you to brush up on your spelling.
It's mileage
in this thread. It's not like anyone is claiming 500rwhp with a cam and bolt-ons. Instead, all the complaining is whether or not anyone can achieve results that are only 10% better than the manufacturers rating for fuel economy.Original EPA Rating for 5.7L M6 - 19/28
Knocking down 30+ every time? No, not a single person has claimed that
Originally Posted by DANOZ28
PROVE IT !!!!!!!! fill her up and post your odometer milage right friggin here! then drive around untill your empty and fill her up at the same pump /station. then post milage and gallons so WE right here can calculate your milage. i believe everyone of you 30 mpg people failed math class! i've requested this twice before and NO ONE steps up to prove me wrong. i wonder why, hmmm?
It's mileage
Teching In
Joined: Jun 2007
Posts: 36
Likes: 0
From: Columbus/Waco Texas
I usualy get between 18 and 24mpg stop and go city depending on if I drive with a brain or like I stole it
On the highway I get 26-30.5 depending on the speed
Belive it or not but I get better mileage at 80 than I do at 65
On the highway I get 26-30.5 depending on the speed
Belive it or not but I get better mileage at 80 than I do at 65
Vettes are much more likely to see 30mpg on trips due to less weight and better aerodynamics. They also tend to have more **** retentive drivers! 
No one has factored in wind either. A strong head or tailwind can easily subtract or add 5 MPG in our f-bodies.
No one has factored in wind either. A strong head or tailwind can easily subtract or add 5 MPG in our f-bodies.
