what is a normal gas mileage for 30-31" tires with no lift?

for some reason im only getting about 130-140 miles out of my 1989 sidekick. i dont know what could be wrong because runs good.

140 miles is about 225 Kms, and I'm fgetting between 225 and 250 kms right now in the winter. In the summer I get as much as 300kms per tank.
Jim

Thats about right if you have 31s and stock gearing. Its a little puzzling if you have no motor 

sounds normal to me....

These little 1.6's just weren't meant for the extra load of the big tires...

most don't even get 25 stock..

Hot Rod's  4 door gets the best I have ever heard of...

My 96 4 Dr. Tracker ( stock ) gets 300 miles plus from a tank. Around 27-28 mpg. Combined freeway and city driving. I've heard many reports of 30 - 35 mpg and more from Trackkick owners. I wonder why there are so many variations? Tire size and gearing I know contributes to the differences. I always do a major tune up when my mpgs go down before I do anything else.

sounds normal to me....

These little 1.6's just weren't meant for the extra load of the big tires...

most don't even get 25 stock..

Hot Rod's  4 door gets the best I have ever heard of...

I'm not kidding either. 5spd stock 5:12s
300miles to a tank (bone dry tho)
but for some reason (maybe winter gas here) I'm getting about 25 with my 31" winter tires
(they do seem a lil smaller)
But my 95 2dr only gets 21mpg  5spd 5:83s  32x10.50 radial superswampers.(also weighs 1000lbs more than 4dr)
Swapped out to BFGs M/Ts (32x11.50) maybe a lil better when i get around to driving it.

Thats strange.  I have "heard" of Trackers getting 30mpg... but have NEVER come close in any of mine.

It is strange that the heavier 4 doors seem to get the best of all (25-27)

It's gotta be gearing.   My Flea,  at 4000 RPM on the highway is lucky to break 22.....

Never checked the Turtle... it goes about 2 days per tank..... LOL,  not too many miles... that is all trail mileage.

I am sure the 4 speed autos, and 5 speed manuals do MUCH better than the 3 speed auto in the flea, cause even with just 235's... I am running some rpm's ALL THE TIME....  I get 160 to a tank,  about 20mpg  average in it, combined city/hwy.... of course I am pretty sure the torque converter isn't locking up either... gotta to get around to that someday.

I have the 5 spd 16V 4dr and try to keep my rpms fairly low on the shift 3-4 K. I get about 28 mpg even on a trip in 5th all the way at about 3,500 rpms. In Phoenix and in AZ you have to drive 75mph on the freeways or people almost shoot at you. I'd LOVE to know how Trackicks can get 30 plus mpg! Is the 4dr gearing different? I wonder how much 16 valves helps.

My '96 2-dr got 30 on good days, 28 on bad days.  Consistently.  And that was accurate, with miles/speed measured by mile-markers and stopwatch and compared to other cars on the same trips.  Then I put on the 235-75s and it dropped to 25-26 (uncorrected, which seems about right).  Top speed dropped to 75ish, too.

My 2003 with the l4 and the same 235/75s averaged 22-23 uncorrected.  Never really measured it with the stock tires.

The same 2003 with stock (XL-7) tires but pushing the v6 through the l4's exhaust is getting 18-21.  Haven't figured out top speed yet, but it's definitely over 110..

My '96 2 dr 16V 5 spd with 225's gets 28 MPG consistently IF... I keep the tire pressure pumped up to 32 psi (which makes it ride like a brick). 

If I drop the tire pressure to the "factory recommended" 23 psi, mileage drops to about 22MPG. 

Towing the camper with the tires pumped up it gets 25MPG.

I'd LOVE to know how Trackicks can get 30 plus mpg!

My 4dr, 5 spd,'98 Sport gets 33 on the highway.  Part of it has to be driving technique.  I avoid the Phoenix freeways.  I stay below 65, usually 60 max.  The kick isn't a racer, so I don't try .  Old age taught me that hurrying usually doesn't pay.  I learned to watch ahead and let the car slow down when the stop lights change.  An additional benefit is long brake pad life--my '94 T100 had 130k miles with the original pads (still in good shape) when I sold it.  My tires are one size larger than stock and I run them at 30 psi.  They seem to wear evenly and the ride is acceptable.  Lower pressure drops the mileage.

My 95 16v auto with torque converter lockup and 31x10.50 AT's gets an average 20mpg. Thats with the turbo. Before the Turbo I was getting around 23 combined. It definitly uses more fuel in the city now, probably because it accellerates a lot harder on boost. However, mileage in the mountains actually got better. Last weekends trip to the Poconos to go wheelin at Paragon showed the boosted motor works less hard on those long mountain grades, even pulling my small trailer with my swampers and gear on it. Exclusive mileage on the hiway at 65-70mph is better than 21mpg.

I get 21mpg consistently on the lowest grade gas with my 18"s on about 32psi
mostly city driving but everyweek ill hit the hwy for training
I normally go about 60-70mph
(especially because the law just changed and they arrest anyone going 80 or above)
and i would run more psi but it rides really hard and I dont want to ruin the rims

I couldve sworn I used to get more though
I think the most I hit per tank was a little over 300 miles (with my alloy 15s)
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Hey REB a PHX guy huh? I gotta use the freeways, but yeah, the Tracker has slowed me down some which is alright. I'll try keeping it under 60 and see what happens

Hey REB a PHX guy huh? ...

I moved out of the Phoenix area (New River) about 6 years ago, but still have to go down to the valley to visit or shop occasionally.  Don't really miss the traffic.  I have found I can get around down there reasonably quickly and stay off the freeways.  They are too dangerous for anyone trying to obey the speed limits or trying to maintain a safe following distance.  Besides, I usually forget my bulletproof vest.