100 miles for full tank of gas normal??? (local)
Or does it realli eat that much gas???

BTW: Its a 91 NA

 

No. Very much no. You should be seeing 200 under normal driving, and more on the highway. I've seen 300 on a tank, once (tailwind). However, if you're driving the car hard (track like duty, sustained really high speeds (100+)/RPM, etc) fuel economy will suck.

As discussed over AIM, you should do a full tuneup. Assume that anything you don't know the replacement time on is ancient.

Plugs
Wires
Oxygen sensor
Air filter
Fuel filter
Clean fuel injectors (professionally, if possible, but fuel injector cleaner may help some)
Adjust TPSs

Once you've removed those variables, if fuel economy still sucks, you can continue troubleshooting without worrying about something silly like fouled plugs causing the problem.

-=Russ=-

 

yeah i get at least 190 on a tank, but thats with my shitty auto, the best ive gotten was 230 when the fuel light came on.

 

Strictly around town I see 220-240 a tank. I've gone over 300 many times when I threw some highway in there. I am also driving a 91 NA. I suggest checking for codes, something isn't right.
http://www.1300cc.com/howto/how2/codes.html

 

Just had my injectors cleaned and have posted a few times about how much injectors are overlooked. I have now increased gas mile over 85+KM (50Miles?)
since haveing injectors done. As well no more hot start flood

 

I'm seeing a little more then 200 per tank in my 89 TII. I have new plugs, new O2 sensor, new air filter, new fuel fiter.....I'm not exactaly easy on her though.

 

i need to get my injectors cleaned and the tps set right. im seeing 160 on a tank on the highway. hehe. probably a vac leak somewhere small.

 

That's really bad. I see about 300 miles before the fuel light comes on of mixed city/highway(mainly traffic). This is on a TII with 1000cc secondaries. I've gotten 400 miles with just highway averaging about 90MPH.

 

Mostly highway miles for me so far with a '90 N/A and I can get over 200 miles on a tank.

Hell I take that back, I made it 250 miles on half a tank. ;D On the freeway from San Diego to LA, filled up and when I got here still had half a tank. That's with lots of cruising in 5th.

--Bob

 

I gett 300-350 per tank all the time. I have some spirited driving in there too. I guess mine is in good tune.

 

I see 240 to 250 a tank mostly highway miles..... and i think that sucks already... but under 100 is just crazy...... u sure there isn't a leak anywhere? my friend had a leak somewhere but didn't smell fuel.... so be sure to check that out

 

my 91 coupe would get 220-240 in the city and on long highway trips at 78~85mph i didnt have much trouble getting over 300miles i cannot remeber my best but i think it was nearly 370 miles and still had a little bit in the tank. find out what the problems are and fix them.

 

Wow... ok, I thought my 300 tank on the highway was good. I'm sure the injectors will help, though. I just need a time when I'm not driving highway for long enough to do it (my beater won't do highway anymore - overheats).

-=Russ=-

 

100? Egad!

My 91 couple will get about 200-220 on a tank of gas, but that's not completely empty, I usually refill it when it gets to the 1/4 tank mark. I don't drive like a granny either, I like the 4-6k rpm neighborhood.

 

You poor guys, I get well over 450, well before my fuel light even comes on! (I'm getting around 29-30mpg)

'89 GTUs

 

i hate u all(except for the guy that started this thread)....i get 180....with O2 not plugged in......both in city and highway.....

 

Man i feel left out...i only get like 15 mpg maybe. but i guess spirited driving (a redline a day keeps the doctor away) and a walbro 255 doesent help =)

 

OK some of these numbers are scary... How are you guys not breaking 275+ on highway?

 

did you check the gage to see if it's working right. it could be waaaaaaaay off, and not your mileage.

 

o danm.....is this the part where i slam my head to my Steel hood 100 times???

Im going to change my spark plugs tomorrow ( hope thatll do it)
then im planning on getting new wires...

How do i kno if my gauge is wrong?

 

well i thougth unplugging the O2 sensor makes the gas mileage REALLY BAD

 

I get like 250.. maybe.. if I keep my foot off the gas. latley ive been averaging like 16mpg city in my t2.. but i only get 20mpg on the highway.

 

My gas guage doesn't work (any idea what I should check to fix that?) but I got 130 miles on a full tank all local driving before my car ran out of gas and stalled on a main street... But my tank also has a hairline crack near the top and drips fuel when it's full so I don't usually fill it.

 

It does.

 

to check to see if your guage works, wait till your gas light comes on then fill up and you should beable to fit at least 12 gallons in there. I average 300 on full tank with all city driving....fast city driving....