North American Turbocoupe Organization

BLKBRD Offline
OK,, so in one of the other posts there was talk about the gas mileage of the TC`s.

I am curious as to what the members are getting.
When I got my TC last year (88 TC manual) I would get around 18 MPG around town and 32.5 on the highway.

Seems others said they got better MPG around town then what I`m getting.
I haven`t checked mileage in a while and I just filled up so I guess it`s time to check again now that I have a new O2 sensor.
One thing to remember, we have 10% ethanol mandated to our fuel here which really sucks.

Post your MPG if you would,,,this should be interesting,,,
`88 Turbo Coupe Blk/Raven 5 spd
`71 Blazer slammed
`62 Impala SS 409/425
`60 Rambler American SW
`56 F-100, sold
--- several HD`s ---

Redbone Offline
Senior Member
You have the 10% ethanol also, huh? I haven't just done only city or only highway but combined (with our crap gas) I average around 27MPG. My car has 176,xxx miles and mods are: 3" turbo back exhaust( with cat and muffler), K&N cone in place of airbox, and A/C removed. I don't think that my fuel pump(Walbro 255lph) should have anything to do with mileage. Oh yeah, boost is between 18 and 19 psi. I just thought of something, is the 10% ethanol in the higher grades of gas (like the 93 I use) or just in the lower grades?
All your boost are belong to us
1988 TC 5m 3" elbow back exhaust(with cat and muffler), Walbro 255, gillis mbc, airbox removed w/ K&N cone, A/C removed, Spec clutch, Ranger roller swap.

John A.

zbird Offline
Posting Freak
I am getting 22/30 Mpg and we have ethanol in our fuel also. Sometimes I get worse when I can't help gettin on it!!! LOL
Dom Z
88 T/C med grey. 140 MPH Speedo, Kirban FPR, Gillis valve,Tripminder, K&N.
87 T/C Silver, Auto (project Daily driver)
99 F150 4x4
14 Ford Escape 2.0L Turbo
88 T/C
87 Silver

goodstuff84 Offline
i usually average around 22, and thats about 80% highway, but i think my right foot might have something to do with that...
88 TC, E-bay 50 trim t3/t4, ported E6, Volvo FMIC, Forge BPV, walbro 255 HP pump, Kirban AFPR, RAM clutch, full 3" stinger single exhaust w/dynomax muffler & dumped at axle, K&N cone on the VAM, *13 base timing, boost @ 20psi.

RC Martin Offline
Posting Freak
Hmmm damn you guys and your 88s. Before my 84 blew up, it was getting only around 17/24. I wonder how much difference was due to problems with my car and innovations on the 88... 32 highway sure would be nice!
Thunderbird Turbo Coupe, Bright Canyon Red TuTone, Desert Tan Interior; 1 of 7 in this combo in 1984 according to Marti.  1 of 13,361 TCs in 84.
   Rebuilt, 3-Angle Valve Job, SYB37 "OE/Small" Slider Cam
   Full 3" Stinger Exhaust to Flowmaster 40, Gnari FMIC/Recirc/BPV, MBC @ 18psi, RF-E6 Manifold, Remote-Mount TFI, PC1 and Flowed 35# Injectors, Inline Walboro 255HP, Kirban AFPR
   Rebuilt Suspension -- KYB & Energy Suspension

Protowrxs Offline
So far I've been around 20-21 in town and 28-29 highway with 195K on the odo and not being overly nice with staying out of the boost.

I noticed if I leave the trip minder on instantaneous mpg I tend to unload the clutch more downhills and getting close to stop signs which seems to help out some. If nothing else it's fun seeing the temporary 90-100mpg.. lol.

If I would be 'nice' I'm sure I could get another 2-3mpg around town.
'88 TC/5spd/Gillis/Tripminder/stock being resurrected
'85 SVO Mustang
'69 Mustang 347/TKO in progress

Spooler87 Offline
Posting Freak
26.1 mpg mostly city driving, according to the tripminder....and it jived with my math.
10 percent ethenol in gas here...that was on 93 octane.
All hail Project "Marauder" !

1sicpony Offline
Senior Member
88 5speed. Don't believe I have ever done better then 22 mpg. Then again it is a show car not a dd. I only drive it when I feel like standing on it to get to a show real fast.
bobby mac

88 TC gillis, modified air filter, 9K
06 ViperTruck,NightRunr 190 of 400
13 copperhead dodge ram hemi

shine1stang Offline
Junior Member
i get 20-25 around town. I really dont do any highway driving. Ive got a big trip planned in two weeks tho. Im driving my bird to Vermont and back. Which is 1000 miles away! I would love to get 30+ mpg with it!
97 mustang v6 turbo play car
601hp@20psi meth injected

DD-88 tbird turbo coupe, converted to 5 spd, cd player and subs. Otherwise stock with 261,000 miles

lonstar7 Offline
Posting Freak
My just bought 1988 TC got 31MPG on the first fill up on the trip back from St. Louis.

1988 Black/Red TC, 5 Speed, 92,400miles (on 4/14/2012). KYB Shocks And Struts, 140MPH Speedo, CHE Rear Control Arms, Otherwise Stock.

2005 Volkswagon Golf GLS 1.9L TDI Turbo Diesel, 5 Speed Manual, InMotion Stage II Chip Tuning

1998 Dodge Ram 2500 4X4, 5.9L Cummings Turbo Diesel, 5 Speed Manual

1988 Firebird Formula 350, 350ci Tuned Port Injection, 700R4 Auto

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