i have a 1988 GXL 123,000 km, intake,header and that about it. I have to put like 10$ in my car a day or more.
It seams like alot and i dont drive it that hard.

My friends has a 1987 GXL streeport, Rb header custome y pipe and magnaflow exhaust and we ported his intake man. He seams to be getting way better milage than me.

whats up with that what can cause out cars o suck back the gas more than others? could it be my o2 sensor? It is the stock one im sure. How much are they and should i get a stock or a bosh one?

thanks for what els you can tell me

 

can you give us some mpg figures?

 

or km/l or some other form of tank to distance figure

 

Its all about how your car is running, and what mods are. Most bolt-ons will help your gas mileage when youre not on the gas, and street porting will help some in the same regard.

Replace your O2 sensor if you havent recently($25-30), same for your plugs, and check your timing.

 

no iv never really worked that out but i knwo the last time i filled her up i might have got like 320km to the tank well i know its under 100km to a quarter

 

that is bad. 1.6km=1 mile correct? That is around 200 miles to the tank. I get around 280-315 to a tank which would be around 450-500km per tank.

 

if its 400 km for the whole tank, then thats like roughly 240 miles per tank, which is bad but not terrible. Replace your 02 sensor and maybe your spark plugs and see what happens.

 

****. I been getting about that mileage myself. Def. gonna look into that.

 

damn, me too. about 230 to a tank. everybody else use 93 octane also? i use 91 sometimes (money is hard to come by right now) and get more miles.

 

No, I use the cheap stuff. 87

 

If you have an N/a use 87 oct

TII use as high as you can get.

 

ya its pretty fackin bad i didnt really care before but now that my friends exact same car with more power and mods is getting better milage

 

I have a similar problem with my 88 gtu as well. I believe it's my float. On a full tank I can go about 40 miles until its on 'E', Then it only takes about 5-6 bucks to fill up (rough estimates, it's been shopped for a while.) I'm not trying to push my luck just in case I am burning that much fuel, so I fill it everytime it starts to get "low". I'm going to get it checked out soon. I thought I'd through it out to you guys. Any ideas?

 

thats weird ...
mine had VERY BAD milage b4 my it broken in
after that it gets like 16mpg