mine sucks! 12mpg, thats just ridiculous! my mods are in my sig.... shes running rich, do i need a safc or an ignition to see better gas mileage?

thanks
rocky

 

Still have your o2 sensor? Have you pulled any codes?

James

 

Ouch. I'm not much better, at least not in city. I'm running ~15mpg city and 23-24 highway. [Edit- I should mention which FC I have: '90 GXL)

-ZenFox

 

I get approximately 15-21mpg depending on driving conditions. It's hard not to take it past 3 on the highway.
-r0gu3

 

Ya- 3800 and up sucks gas
I average 14 MPG mostly city. (N/A too!)
Most 7's run rich though.

 

mine is 25-30 but i drive the highway alot

 

when I first got it I was getting single digit mpg lol but I've learned how to drive for economy and can get about 14-15 mpg now

 

Damn...a lot of N/A guys getting worse mileage than my TII, which gets 17/23. I had better check and see how lean I am running.

 

26-28 Highway with a little city driving

 

I was on the MA turnpike (big, long, streight stretch of freeway) holding between 75-100mph and I averaged out at 22.63mpg Though there was some city driving.

 

Get ready to hate me. 19 gallons, 505 miles. Thats mixed city/highway, about half and half. For those of you who dont like to do math, thats just over 26 mpg.

 

I think I get just under 15mpg in my TII. I got to be running rich though. I am going to do an experiment(if possible)...I'm going to run a full tank without going over 3800rpms Now I think if I do that I will get like 25mpg

 

I hate you. :P Anything that you've done to get that type of gas milage? :P

 

if it were mine i'd tell the whole story 26.578947 mpg, you are 1 lucky dude i get about 14mpg on the highway.

 

whoa, i'm glad im not the only one! i can stretch it, on the trip back(from missouri where i got the car to houston tx. where i live), i was getting around 17-20 on the highway, i'm running rich. i need to see if my o2 sensor is working, the guy said he replaced it like a year ago with a new one so it shouldn't be bad, but the wiring is all hacked up for the a/f guage that was in there. so that might be causing it to run rich, and get crappy mileage...


man, i put 5 dollars in today, all gone by the end of the day!

 

I get about 200 miles to a tank. I have no clue the actual size of the tank, so I have no clue on actual mileage!!

 

i get about 17-20. If you stay under 3,800rpm youll get better mileage.

 

86GXL N/A 5 speed.
250miles on a full tank that was filled up with 14.5 gallons gives: 17.24mpg

that is with 80%city(half 3kRPM shifts and half redline ) and 20%highway driving(80-100mph in 5th gear).
^This is the most common scenario^


I always calculate my mileage in every car, especially now that the prices are so high
I will prolly get 12mpg when I get my TII back after breaking in the engine

 

'86 NA 5-spd GXL with Bonez superflow system. All else stock.

20MPG City/country mixed foot to the floor to redline entire every change I could.

 

sorry, I'm a goofball. I forgot to list my mods:
RB header/pre-silencer/rusted to **** stock cat-back
cone intake
big *** heavy stereo equipment

 

I usually buy 4-8 gallons at a time, which keeps the car light(gas is heavy, 5.5 lbs per gallon). My best gas mileage was 172 miles from 6 gallons. I put 6 gallons in when the low fuel light came on, and when it came on again, I was at 172 miles. Same as always, mixed city/highway. And all that is with 89 octane. I could probably get another mpg or so by going down to 87. I was getting 23-24 mpg on 93 octane before the gas prices started going up.

For the most part, a free flowing intake and exhaust system will increase your gas mileage(unless you get on it all the time), and a light car realy helps too. One thing that I did just for the gas mileage was make a new throttle arm for the secondary throttle plates. My primary plates are open at about 30% before the secondary plates even start to open. But by WOT, both the primary and secondary plates are fully open. That really helped my drivability and gas mileage. Ill get a pic of it later for everyone.

 

Ya I never put more than like $10 in which around here comes out to like maybe half a tank of 93. Its not to keep my car light, just seems to be bad luck for me if I got a full tank. Thats when my cars break down on me.

 

so octane will affect it too? i used to run 89, now i run 93 would that bring it down too?

im going to drive under 3800 all week next week, and use 89 to see what i get, wait, i have to goto the street races on sat! oh well i'll start on monday, hehe

 

when my car was stock, I was getting 21 mpg with 30 city/70 highway.
How with my mods, I am getting 25 mpg with 30 city/ 70 highway.

Guess mods help performance and milage

this is with 87octane gas

 

Stock 87' here and I get about 9mpg I bet all those insight owners are gonna be a bit jealous now.