How many MPG do you get? How many miles are on your car,and with what mods?

Sources say that gasoline prices could climb to the $3 mark this summer...lets hope not.

 

I get abut 280 per tank with Pullys MSD 6AL Chip Coolant mypass Exhaust and som eother minor things

 

I get 24 MPG,high flow air filter & Dynomax catback system.underdrive pulleys coming soon!

 

I get about 150 miles a tank on premium, less on regular

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89 Firebird (AKA "Money")
2.8 V6 w/ t5 tranny (383 tpi t56 12/01)
Flowmaster 80 series, 3" Intermediate, SS Tips, Random Tech Cat, Msd Coil, MSD 6a, Accel 8.8 wires, Cold Air Intake w/ K&N, Lakewood LCA's, Brushed aluminum Hood pins ETC...
Next:
Spohn Torque Arm, Lakewood Panhard bar, BMR Fabrication Sub Frame connectors...
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My Site:
www.geocities.com/firebird89white

" I'd rather run last in a full out race, than to NOT run at all ".

 

Thats like 10 mpg...eish

 

I got 26+ highway before I put an O2 sensor on. It fell off a year or two ago and I didn't replace it until this November. Haven't driven it since then.

BTW, Does anyone know if the O2 sensor will improve the mileage any?

DB


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1986 FireBird
2.8L MPFI
Gutted Cat, No muffler (Sweet Sound)
Was 700-R4 --> Now T5
Headers????

 

In my 86 Camaro SC w/ 136,215 miles I get about 22-23 mpg. I've gotten as much as 26 before on one trip. Most of my driving is interstate at around 70-75 mph. I do a little city driving too. I've went about 310 miles on a tank of gas and 13.5 gallons filled it up so I figure I can get about 340-350 out of a tank of gas but I never go that far b4 fill up. 22 x 15.5 is 341 so that would be about right for me.

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Red 1986 SC, 2.8L, rebuilt 700R4, 3.42 Posi, t-tops, 136K miles and counting, K&N air filters w/ removed air baffles, hopefully more to come!

 

Highway 25 mpg (+375 miles per tank) and not using "Highway Mode". I am hoping to get 28-30 mph with "Highway Mode" invoked. Car has 167,000 miles on original L98; heads and waterpump never been removed.

 

AAAAhh....17mpg, think my 02 sensor's bad?

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See pics @ Billy's Firebird
92 Bird 3.1L Auto
Best $750 I ever spent....
DRIVE IT LIKE YOU STOLE IT!
Kills:
93 Mustang LX (Before Mods)
98 or 99 Dodge Stratus (tough one, edged out at 40)
92 Camaro RS 305 TPI
97+ Honda somethin or another...modded....kept at my door the entire way
Close Calls
94 Grand Am 3.1 V6
92 Cavalier 3.1 V6
01 Porsche 911 Turbo (Had em till first gear)
Mods-Jet Stage 2 Performance Chip, Accel Cap/Rotor, Accel 8.8 MM Wires, Accell Coil, AC Delco Rapidfire Plugs, Dynomax Catback, K&N
AIM name OVRCLCK350

 

In short. Too few
Converting numbers isn't very good at 1:45 in the morning, but I get 350-400kms on a tank and get 20 or so MPG (that I am fairly sure of), and that's in nice weather (spring)It seems like so low for my car though. Most of my driving comes from a 10 minute trip to school and back on about 50 MPH roads. Me thinks though that it is too low, or were the carbed 2.8's that bad?

EDIT: BTW I have nearly 96000 miles on the engine and my 350 kms = about 240 miles or so

[This message has been edited by 1984-Firebird-SC (edited February 10, 2001).]

 

sounds like me and you have the same problem Graeme's I also only get about 10 mpg.

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1987 Firebird 2.8 more show than go. Still turns over 10' tires though.

 

Overclk350, what mods do you have on your engine? Send me an e-mail and I can tell you which ones may be "hooping" you.

Some of these "time honored" mods don't work as well as people think they do and often they tend to cause the engine to run far too rich; burning gas needlessly and making your car actually run slower.

 

20-23MPG, 148,000, Mods are below...

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90 Firebird SSA (Bone stock 3.1)

Everything Below I've added

Engine: Accel Super Coil, 8mm Accel Ignition Wires, 170 Degree Thermostat, NKG Plautum Plugs, K&N Filter, Flowmaster 80

Suspension: Bell Tech Drop Spindles, Edelbrock PanHard Bar, Lakewood Lower Control Arms, Wonderbar IROC-Z, KYB GR2 Struts, KYB Gas-a-Just Shocks, PST Suspension Polygrapite Bushings All Round, 36mm WS6 Front Sway Bar, 24mm WS6 Rear Sway Bar

Brakes: Cross Drilled and sloted Rotors

Appearance: Trans Am Tail Lights, Trans Am Wrap Around Wing, Trans Am 16" Alum rims, Tinted Windows Rear 90% Sides 50%

Interior: GTA power seats, Overhead console, Power windows, Power locks, T-tops, Sun shade, Pioneer P77DH, Uniden radar detector, Intellitronix - Fuel pressure gauge, Transmission temp gauge. (In pods)

 

I get 22-23 MPG in combined city/highway driving with 89k on an '89 2.8 with 93 octane Mobil.

And yet, the '95 Grand Am, which will eat the RS, gets over 26 MPG on regular with the 3100 SFI V6, and I drive it harder too!

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Jason E
"The Cruiser"
'89 Camaro RS 2.8
Hypertech chip/K&N filters/Accel 8.8 wires, Accel Supercoil/RapidFires
Eclipse CD and 100x4 amp/Boston plates and 6x9s
Alpine Alarm, Keyless Entry
"It's for sale"

"The Driver"
'95 Grand Am SE 3.1 Coupe
No mods yet...

I'm the only third genner who's daily driver is faster than their third gen!

 

I find it interesting that on the highway, that the V6s don't get any better than my L98. In fact, some appear to be getting worst.

 

I just got back from a trip to indiana and I got 400 miles on 14 gallons. I have a borla exhaust and a tornado air. I think it is the tornado air because I did the same trip three months ago and averaged 365-370 a tank.

 

W/ my V6 I get 26 mpg at the best on the highway but an average of about 23mpg & 15-16mpg in town. & the engine has 131k miles on it.

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- Mike Harvey -
1986 Firebird S/E

 

My 87 camaro has approx 165,750mi (265,200km) on it & gets about 250mi in the city (almost400km) and 310mi on the hwy (500km). The car is basically stock except some rapidfire plugs & a modded airbox. Oh yeah it has a diffrent rear-end too but I'm not sure of the ratio

 

Well, I just did my first test of "Highway Mode" on the eprom and I got 27.3 US mpg (11.55 km/litre). This wasn't even getting "aggressive" with the Air Flow ratio.

I plan on doing another test and I should easily get over 28 US mpg. This is with an L98, 4L60 and 3.23s.

 

i get about 21mpg i mostly going 55-65mph
30k mi on engine...no mods

 

You guys'll all hate me for this, but somehow my birdy gets me 33 miles per gallon on highways. I can't explain it, as it's always been like that since I bought it. What could the past owner have done to get this kind of mileage?

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--
Kevin-87 Firebird 2.8 liter A4
!Cat, !Maf, !Air Intake, K&N, Bosch Platinum +4, Blue Streak Cap & Rotor
Performance Rebuild in the planning stages...
Best 0-60 10.26 seconds...for now

 

87Firebird, is that 33 US mpg or 33 Imp(Canadian) mpg? There is a BIG difference between the two. At 10 kms/litre, there is 23.52 US mpgs and 28.2 Canadian mpgs.

Also, Manitoba is pretty flat. Try doing it in a mountainous area like BC. I have never tried my car on flat land. May be I will during the summer.

I am not refuting or discounting your claims, it's just that I know that many Canadians think in Imperial and not US. I get this too when I tell people my mileage and they say "that's nothing, I use to get that in my old .... " and then I say, yes, but I am quoting US mpg not Imperial mpg.

[This message has been edited by Glenn91L98GTA (edited February 20, 2001).]

 

What mods have created the best improvements and what mods have hurt the fuel econmy the most?


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86 Camaro 2.8, 92 Firebird 3.1, 1951 Chev 327, Four-wheeling hybrid.

 

I dunno, Glen91, you tell me. I first figure out KM per liter, then Miles per liter, and then multiply miles by 4.5 to get miles per gallon. Which system has 4.5 liters in a gallon? I thought I used the imp system, but now, who knows?

 

87, 4.54 litres/gallon is Imperial. 3.785 litres/gallon is US. 33 x 3.785 / 4.5 (to convert your factor) = 27.75 US mpg. About 1/2 mpg better than my L98 (in mountainous terrain).

As I said, this is with my eprom optimized for "highway mode" (the hidden feature from GM). The gas savings alone pays for all the eprom burning equipment. I bet with Highway Mode invoked that you WOULD get over 33 US mpg or 40 Imp mpg. That's better than a Jap 4 banger and with more power (and style too)!

The beauty is that you will save this money FOREVER! (plus have the equipment to make more HP too).

The late model V6 MPFI guys are lucky that you use the same ecm and eprom (except the ESC circuitry) that us SD L98 guys have. Whatever us TPI guys can do to our eproms, you can too!

Earlier V6 MPFI cars with the MAF must use the MAF eprom. Not as well "hacked" but we are getting there. I expect to figure out where the "highway mode" parameters are on the MAF cars in a week or two. I have a friend with a MAF ZZ3 and we are getting into hacking that now.

[This message has been edited by Glenn91L98GTA (edited February 21, 2001).]