only change i have is a KN filter. i run mainly highway 65 mph. i fuel up at 1/4 tank left simply to keep the pump submerged. doing this i get about 23 mpg or 300-310 miles per tank.

i have yet to change the plugs or wires. ill be doing this soon and im not going to mess with the O2 sensors until i change my exhaust hopefully. trey

 

200-230 to each tank. I live 5 miles from work so my car never warms up. On a highway trip I can get 300

 

Fill my S/C'ed up every 240 can wait a few more miles.

 

i used to get about 230-240 with a M6 and bolt ons

now with the mods below and an auto i am lucky to get 180-190

 

I was getting 230 per tank (13.5/14.0 gallons to fill it when I got to 230). Then I did a full tune up, plugs & wires when I did the headers, and I went to 310 per tank (14.0, 14.1 gallons to fill it).

 

Are you people F-in shi++in me?!?!?!?! It's a 97, but I am VERY lucky to get near 170 from way full to a thread near E. Most I got recently was almost 300 on a long *** road trip.

 

i get 150 a tank WTF???

 

220 while being very easy on the gas in the city...

 

210 at best on surface streets. Must be the 3.73s, but I love them

 

Last full tank, I got a surprising 270 with about an eighth (actually less than that) on the gauge left. See sig too.

 

On one road trip recently (1200 miles) I got 420 miles on one tank driving no more than 5 miles over the speed limit. I cant understand it, when the car was new I got about 28 on the highway, now with the 4.10s it gets the same or better. This is a known distance so I know that the odometer it correct.
One thing I did, I took the front wheels off a while ago and I couldnt spin the rotor, I loosened the brake bleeder and brake fluid shot out like it was under pressure. I may have over filled the resevoir at one time, it seemed to get better after that.
Ron

 

Driving to and from work a tank will go 320 miles.
Out on the highway I usually get around 450 to 460, with a best so far of 467 miles with a fill-up of 15.2 gallons

 

450! That's insane! I've never heard of that. But, it's working for you. You've dialed something in right.

 

Thats what I'm getting now, about 230 a tank drivin it moderately. Next tank im gonna really drive soft and see what i get. I need to change plugs and wire soon seeing that theyre stock and the car hs 70k on it. I'd just like to do it when I have the money for headers as well.

I hope i get up to what youre getting.

Think 02 sensors coudl help as well?

 

I only saw two people actually stating their MPG, which makes much more sense. Everybody fills up their tank at a different time, so miles per tank is kinda useless unless you state the amount you put in the tank and then we would still have to calculate it...

Anyways, I have a pretty much stock M6 and I get around 22-23mpg driving highway (don't get to use 6th at all on that road) back and forth to work (17 miles one way). Going 75-80mph in 6th on the interstate for a long ride, I get close to 26 mpg. On the other extreme, it's kinda hard to get below 20mpg, even when I am playing around town

HTH

Sam