V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

36 MPG, good or bad?

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Old May 6, 2007 | 08:01 PM
  #1  
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Car: 1987 Firebird Formula
Engine: 2004 LQ4
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36 MPG, good or bad?

I got 540 KM to a tank of gas, 59 Litre tank, with some conversions and fun stuff it was roughly 36 MPG. Is this normal for a 3rd gen?
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Old May 6, 2007 | 08:06 PM
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From: Jacksonville, FL
Car: 86 Firebird
Engine: 2.8 V6
Re: 36 MPG, good or bad?

Um. Did you put a hybrid engine in it?

Sounds nearly impossible to me. Are you sure all the math and numbers were right? I'm horrible with math so I wont even try.
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Old May 6, 2007 | 08:09 PM
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From: Windsor Ontario
Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
Re: 36 MPG, good or bad?

hmm.. thats a possibility, I've had 2 hours sleep in 3 days so I'm kinda worn out.. But I found out what I did wrong, I typed the wrong numbers into the windows calc. It was 400 KM on the odometer when I filled it up again, that was almost empty. so 400/59 comes out to 6KM per litre..
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Old May 6, 2007 | 08:12 PM
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From: Tallahassee, FL
Car: 89 V6 Camaro
Engine: 2.8
Transmission: 700R4
Axle/Gears: 3.42 open diff
Re: 36 MPG, good or bad?

So what is the American conversion. I could believe 26 but 36 is rediculously good.
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Old May 6, 2007 | 08:21 PM
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Re: 36 MPG, good or bad?

Hybrids run ~40m/g. If I could ever get a camaro to run like a hybrid, I would kiss the feet of he who was able to do that.
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Old May 6, 2007 | 08:31 PM
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From: Castaic, CA
Car: 1988 Camaro RS
Engine: 2.8L of Raw POWER!!!
Transmission: Stick Shift
Axle/Gears: 3.42's
Re: 36 MPG, good or bad?

I got 35mpg on time on a trip from L.A. to Phoenix.

26mpg on the freeway is considered excellent for our cars, 20mpg in the city.
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Old May 6, 2007 | 08:38 PM
  #7  
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From: Windsor Ontario
Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
Re: 36 MPG, good or bad?

it's probably 20-26 than. Thats with beating the **** out of it all night, too..
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Old May 7, 2007 | 08:30 AM
  #8  
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From: Wyoming
Car: 92 Chevrolet Camaro RS
Engine: 3.1L V6
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Axle/Gears: 3.42
Re: 36 MPG, good or bad?

w/ my healthy V6 camaro (T-5), i get 30mpg on highway and about 23-25 in city, if i'm nice to her , if i'm mean my mileage goes down the **** hole

Last edited by KBcobra; May 7, 2007 at 04:37 PM.
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Old May 7, 2007 | 09:05 AM
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From: Massillon, Ohio
Car: 87 TA
Engine: 350
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Axle/Gears: 2.73
Re: 36 MPG, good or bad?

I get 30-35 mpg highway with my car...29ish in city. the 2.8l in my camaro only got about 12-15 in city. and the 3.1l in my bird got 15-20ish...
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Old May 7, 2007 | 09:50 AM
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From: Hamilton, NJ
Car: 88 Formula, 04 CTS-V, 06 Commander
Engine: 305 TBI, LS6, 4.7 V-8
Transmission: 5 spd, B&M Short Throw
Re: 36 MPG, good or bad?

Originally Posted by Kevman
hmm.. thats a possibility, I've had 2 hours sleep in 3 days so I'm kinda worn out.. But I found out what I did wrong, I typed the wrong numbers into the windows calc. It was 400 KM on the odometer when I filled it up again, that was almost empty. so 400/59 comes out to 6KM per litre..
Quick Conversions:
KM to Miles: 0.621371192
Litres to gallons: 0.264172051

Therefore: 400km = 248.55mi and 59 litres = 15.57 gallons
Looks like if your numbers are correct, you achieved 15.96 MPG. If your original 540km for the tank is correct then you achieved 21.55 MPG.

Hope that helps.
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Old May 7, 2007 | 02:26 PM
  #11  
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From: Hollywood, CA
Car: 1990 Firebird
Engine: 3.1
Re: 36 MPG, good or bad?

I can squeeze out 210 miles per tank in my 3.1 if Im lucky . Will be fixing that next....at 3.60 a gal, cmon!

Kevman Looks like your getting good numbers though.

Last edited by killerklown; May 7, 2007 at 06:23 PM.
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Old May 7, 2007 | 05:41 PM
  #12  
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From: Sherman, Tx - N. of Dallas
Car: Blue 89' RS
Engine: 5.7L
Transmission: 700r4
Axle/Gears: 3.42
Re: 36 MPG, good or bad?

i get 350 miles per tank on the highway in my 89' ... dunno about the 83', never really tested it, but roughly 4-5 hours of drive time.
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Old May 7, 2007 | 06:50 PM
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From: Knoxville, TN
Car: '87 Camaro / '87 Chevy K10
Engine: 3.4L MPFI (soon) / 5.7L TBI
Transmission: 700R4 / 700R4
Axle/Gears: 3.42 / 3.73
Re: 36 MPG, good or bad?

I once got 270 miles on half a tank from here to North Carolina; I still can't believe it myself, but the sending unit and my math are all right.
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Old May 7, 2007 | 06:55 PM
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From: Massillon, Ohio
Car: 87 TA
Engine: 350
Transmission: 700r4
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Re: 36 MPG, good or bad?

Originally Posted by forkvoid
I once got 270 miles on half a tank from here to North Carolina; I still can't believe it myself, but the sending unit and my math are all right.
You must've driven through a time warp...lol
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Old May 7, 2007 | 07:52 PM
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Re: 36 MPG, good or bad?

Originally Posted by j dezzy
I get 30-35 mpg highway with my car...29ish in city. the 2.8l in my camaro only got about 12-15 in city. and the 3.1l in my bird got 15-20ish...
29 in the city?!?!!?
I once got 270 miles on half a tank from here to North Carolina; I still can't believe it myself, but the sending unit and my math are all right.
The first half, maybe. The first half of a tank will get better mileage than the secon half (not really, but the guage is not linnear).


I usually see 275 miles with mixed driving. I have never taken my car on a trip, I'll put the miles on the Ford or Lincoln first, lol.
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Old May 7, 2007 | 09:10 PM
  #16  
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From: Massillon, Ohio
Car: 87 TA
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
Re: 36 MPG, good or bad?

yup, 29 in city. being a manual it really helps with gas milage. and the holley street dominator is an amazing carb. it's a big help with fuel economy.
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Old May 7, 2007 | 09:54 PM
  #17  
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From: Hawaii
Car: 89' Firebird / 87' Formula
Engine: 3.4 / 5.0
Transmission: 700-R4
Axle/Gears: 3.42 / 3.42
Re: 36 MPG, good or bad?

my 2.8 gets 0 city...0 highway...lol

Hasnt been in the car for nearly a year!
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Old May 7, 2007 | 10:10 PM
  #18  
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From: Maui, Hawaii
Car: 1984 Trans Am
Engine: broken 385sbc
Transmission: G-Force rebuilt T-5
Axle/Gears: Currie 9" Ford 4.30:1
Re: 36 MPG, good or bad?

nowadays, anything above 20mpg is good.. 36 is awesome.. what do you do?? run it up to 100mph, cut the engine and roll for 10 miles?? jeez..
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Old May 8, 2007 | 05:46 AM
  #19  
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Re: 36 MPG, good or bad?

Originally Posted by forkvoid
I once got 270 miles on half a tank from here to North Carolina; I still can't believe it myself, but the sending unit and my math are all right.
must have driven down i-40 through asheville down that huge mountain!
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Old May 8, 2007 | 11:56 AM
  #20  
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From: Knoxville, TN
Car: '87 Camaro / '87 Chevy K10
Engine: 3.4L MPFI (soon) / 5.7L TBI
Transmission: 700R4 / 700R4
Axle/Gears: 3.42 / 3.73
Re: 36 MPG, good or bad?

Originally Posted by WheelsUp84z
must have driven down i-40 through asheville down that huge mountain!
Yup! Down into Asheville at night, through the unbelievably thick fog. My car was running absolutely amazing the entire trip(the return trip was absolutely terrible, cost me a tank and a half to get back).

Originally Posted by firstfirebird
The first half, maybe. The first half of a tank will get better mileage than the secon half (not really, but the guage is not linnear).
It was actually the second half of the tank, oddly enough. I'm aware of the non-linnear gauge, and it annoys the crap out of me.
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Old May 9, 2007 | 10:46 PM
  #21  
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From: Tenino, Washington
Car: 89 f-bird and some others
Engine: 3.4
Transmission: 700R4
Axle/Gears: 3.42
Re: 36 MPG, good or bad?

I was getting 28 avg to 33 freeway with my 2.8. 360-380 miles between fillups.

The 3.4 has been sucking down gas (22 ish) I was barely able to go 300 between fillups.

I managed to get up to 24mpg lately after advancing the base timing to 10ish, replacing some vac lines, and getting it aligned.

I don't know how many miles though per tank, as I can't bring myself to drive that long without buying gas because I gotta keep getting it before the next price increase every 4 days.
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Old May 9, 2007 | 11:04 PM
  #22  
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Re: 36 MPG, good or bad?

I get just a tad over 200 miles on a full tank if I stay strickly on the highway (and under 100mph).
a little over 150miles in the city when I am hot ******* the car.
I really need to get an LSX/T56 setup with gas at $3/gallon.

EDIT: why do I keep posting in the V6 forum?
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Old May 10, 2007 | 09:12 AM
  #23  
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Car: 1988 Trans Am
Engine: 305 TPI
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Re: 36 MPG, good or bad?

I get about 16 MPG in the city and about 22 on the HWY. My mileage really depends on my driving behaviour. Sometimes I get 13 MPG in the city (having fun) and other times I can get up to 18 MPG in the city with good driving manners.

Pat
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Old May 10, 2007 | 05:01 PM
  #24  
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Re: 36 MPG, good or bad?

ive never calculated it but i bet last summer i might have gotten 18ish, but this summer...maybe 12
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Old May 10, 2007 | 05:15 PM
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Re: 36 MPG, good or bad?

I get about 17 city and 22 highway. The highest I've ever seen was 24 on the highway which seems low, but then the only highway driving I do is at 80-85mph.
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