Brett Gutshall

Hey I have a 305 TPI 5 speed Formula. I took it up to my friends house for the Penn State game and to chill with him. I had 330 miles round trip and got a little over 23 MPG. I didn't think it was too bad considering a lot of it was back roads to avoid construction, I drove around some up there through town, and I was having a little fun blasting up a mountain at 95 mph in 4th. I was just wondering what you guys are getting on the highway to see if I'm on par. I may be taking my car to Richmond for the race. Thanks everyone.

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90 Formula 305 TPI 5 speed
K&N, Dynomax Muffler

GofasterFirebird

iTrader: (3)

Around 24 if I stay out of it. 3.23 geARS and .62 od help.

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1991 Firebird
350 L98 (was a 305 TBI),T-5,Edelbrock TES and cat back,Accel manifold
NOS,subframes,jegster torque arm,MSD Digital 6
AFPR,Lakewood lcas
Hurst linelock,SLP cam (206 212 .480 .486),relocated battery,cold air,Hypertech chip,centerforce df,clutch
poly bushings and mounts
AFR 190s
Harland sharp 1.5 rockers
autopower rollbar

12.33 @ 114.83 juiced uncorrected

13.510 @ 102 non juiced uncorrected

Jim 86 Bird

21 mpg with mostly highway, 25-28 with all highway, and 18 minimum with lots of city driving.

305 tpi 5-speed w/ 3.08 gears

RARE-ROC-Z

19-23 with both city and highway, i live outside of town (UNTILL NEXT WEEK).

and that is on a modified 350 with 3.27 gears, not bad. that is why i love fuel injection.

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Jarrad
1990 IROC-Z L98 350 TPI
TH-700R4
G92- 9 Bolt Borg-Warner 3.27gears
Dupont Flame Red Hardtop/ Grey Interior

Working at Carl Cleve & Sons Auto Body Repair as the wetsander/buffer.

1991 GREY S10 2.5L/5SPD -FOR SALE.

okfoz

I get a nice 23.5 MPG all highway
about 18 in the city

On average I get around 20

I went from 18 on the highway with my 4bbl

Granted I have a 3.73:1 gear as well.

My 1990 Riv gets about the same, it weighs about the same, and its only a 6 cyl. I can't complain about my fuel milage on my Formula.

John

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87 Formula Yellow/Black

5.1 TPI Automatic
Baer 12" brakes 4 wheels, KYB AGX Adjustable Shocks & struts, Custom Leather interior, WAAAY TOO MANY MODS TO LIST

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

3.1EyeCandy

iTrader: (3)

17 mpg no matter how I drive (including a whole tank under 2200 rpm). I've changed the oxygen sensor, fuel pump (this dropped my mileage from 19 to 17), fuel filter, and properly aired up all 4 tires. I have NO clue what is causing this bad mileage, but the car runs great.

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~3.1EyeCandy~
"The Car that started my craze"

'92 Firebird 3.1 (A car sold)

My new baby: '87 flame red GTA 350 w'auto, ported and polished plenum, custom cold-air intake w/K&N, 180* thermostat, Hooker SuperComp Exhaust, Splitfire plugs, Hypertech Airfoil,
Carmine interior with pioneer all around
My Cars

jonathan_badgett@yahoo.com

Mkos1980

iTrader: (8)

My best was 26 on my modded 350 TPI usually its around 21 though.

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89 FORMULA 350
99 Grand Prix GT

Jason Aschle

I have been getting great gas mileage since I put the 3:70 gears in my car, a ton better than when I was running 2:77 gears (no, this is not a typo). The engine does not need to work much at all on the freeway, and it seems much smoother around town. I run 2100 rpm at 65 or so mph and have been getting anywhere from 27 - 29 mpg !! The best of both worlds! power and economy. Who needs a Honda? 8^)

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1991 Camaro RS/Z28,polished TPI, 355ci. Sportsman 11 heads, LT-4 Hot cam,Pete Jackson gear drive, on,and on, and on... best E.T.>13.4 new best MPH> 108.7, no traction, no tuning, The car is pictured in Chevy High Performance magazine, June 2000 issue.
http://www.geocities.com/jasonsz28us/INDEX.htm

1997 GMC Yukon, 4 wheel drive, leather, loaded, Gibson exhaust, K&N intake, Boston pro series speakers..... That's it so far.

1969 Camaro,12 point cage, total project right now, I am planning an LS1 - T56 - and a Vette independent rear. Pro Touring crowd, look out! 8^)

patrick sieben

with a 383 I get 10 liters to 100km and on average 13.5 liters to 100 km in the mix, this was surprisingly good!

88 350 tpi formula

iTrader: (9)

I was getting about 21-23 with 700r4 then I went to t-5 and I got 24-26mpg now with the jump from the 3.23 to my 3.73 I get the same as my 700r4 was I guess there are no real complants I ended up with the same final gearing or at least very close.

Randy92Z

iTrader: (3)

With my combo I get 15 mpg in the city and I got a best of 21 mpg on the Autobahn. That was cruzing at 90 and many runs up to 130 mph.

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Convertible, L98, Mini-ram, ZZ9 cam, Comp Cams 1.6/1.52 steel roller rockers, Trick Flow 23* heads, K&N's with chopped airboxes, March underdive pulleys, Edelbrock ceramic coated TES, Flowmaster cat-back exhaust, Dynomax high flow converter, Accel 300+ box & coil, Taylor 409 wires, Fastchips custom chip, MAC sub frame connecters, Lakewood LCA & Adj. Panhard rod, SLP 2500 stall, 3.42 rear gears, 1LE aluminum driveshaft, white face gagues, and NOS!