Okay, sorry for getting people worked up. To answer the questions above, I am running stock firestone tires. I am sorry but I don't remember the size right off the top of my head since this truck is still new to me and I can only learn so much at one time. Also, I checked the axle code on the sticker and found out that it is 3.55 for the axle ratio.

I understand the jist of the forums. I have been on earlycj5.com now for the last couple of years and it is by far the friendliest site that I have ever seen with really good moderators and really friendly people. I would encourage anyone with an interest in jeeps to stop by and take a look. I personally own 2 1970 Kaiser CJ5s, a 01 Dodge Ram 1500 and now a "new to me" 93 Ford. I also used to own a 91 Jeep Cherokee limited edition. But back to the forums, I understand that the miles per gallon that I got might be a fluke that I will never ever see again but I did everything I was supposed to do to get accurate numbers and I believe them so far. On earlyCJ5.com we tend not to criticize the newbies and if we feel that they are wrong we will point them in the right direction or just say nothing at all.

 

i really don't believe 23 mpg with 3.55s.

not criticizing you at all.

if someone had 1000 posts i would say the same thing.

 

Ok... that's valid. Thanks for the level-headed response.

Now, you gotta realize a couple things here:
- no one (to my memory, at least) has ever posted that their 1987-96 F-series truck, with any engine/tranny/rear axle combination, has claimed that their truck even approached those mileage numbers. Not even close. I used to get 18 with my F-150, but it had a 3.08 rear, 5 speed overdrive (.8) and a 300 straight six (smallest motor, lowest peak torque too). I kept my truck really well tuned up, and 23 MPG was completely out of reach. Unattainable. The only F-series pickups that will touch 20 MPG are the mid 80's 2wd F-150's with the carb'd straight six and a four speed manual overdrive with very high rear end gears.

- you're new on the forum. People tend not to believe new users' seemingly wild claims.

 

I understand, I momentarily forgot I was a newbie to this forum. Like I said again... that number is odd to me but so far they are consistent. I know from averaging previous gas mileages that it is easy to get 19 mpg if i kept it below 65 mph so I just wanted to experiment and see just how high i could get it.

I don't like to argue or go against the grain so im done defending myself.

 

I just thought of something since everyone is telling me I am wrong....

I have been reading that on trucks with dual tanks that some people have a problem with gas from one tank spilling over into the other tank. Is it possible that gas from my full front tank is spilling over into my rear tank, thus adding gas and throwing off my readings. Since I am doing the same exact drive everytime I measure my mileage, I wouldn't be aware of the inconsistencies that might have arose if the distance was changing on a regular basis (normal driving).

 

Ummmm, certainly a possibility. Only way to check your mileage right is fill both tanks completely full, drive a known measured distance and fill BOTH tanks again. Then figure your actual MPG.

I really hope you are not discouraged by the posts that have been made, as we always encourage new members to FTE, but you must understand that these MPG figures are so out of line with what these guys are getting that it makes it hard to believe. Just as an example, a 2008 Ranger reg cab 4 cyl auto will get maybe 23 MPG hwy so it really makes it hard to comprehend that your combo would deliver those numbers.

Again, don't get discouraged and keep coming back. Best of luck to you!

 

Some impressive numbers there

 

I like everyone else finds 23mpg pretty high but then again how much tail wind, slope was he going down? I've seen almost 19mpg in my f150 in town! IGrant that was babying it and driving like thiers a egg on the dash. I've seen 14-18.8mpg in my truck so far in town and needign a tune up.

 

I just want to see if i can give a lil lesson here. A big one that the military has taught me.

When we have exercises or real world deployments and our low ranking officers report up the chain they report that everything went very well no matter what happened. They do this so that they can brown nose and rank-up quicker, why they do is insignificant though. Using this method also usually insures no blame gets shifted on anyone and nobodies feelings get hurt, even if that person was in the wrong. What come from this, nothing, nothing gets corrected and the same mistakes are made the next time peoples lives may be on the line.

If you ask the people who actually do the majority of the work and therefor suffer the consequences of things not going right(enlisted) will hurt others feelings and point fingers. This brings about the truth(mostly) and allows for corrections to be made and helps to prevent more wrongdoings from happening in the future.

So people can stay happy, peaceful, and correct nothing, ignorance is bliss. Or they point out what was done wrong, by who, why others didn't point it out earlier and fix it. People will learn more, become more efficient, any maybe even save lifes. If there feeling get hurt they can cowboy up or go home and cry, either way the facts need to be stated for the problems to be fixed.

Provided lives are on the line with our trucks(usually), but IMO this should be applied to everyday life for every human being. Not necessarily in all cases though.

 

23 MPG highway...man that would be nice. I made the same 700 mile round trip a couple of times this year in both of my vehicles. My F150 5.0 auto 4X4 did 16 and I was really pretty pleased. My Mustang did 25 and I was ecstatic (it is a toy and definitely not stock). This weekend I am taking the truck again for the same trip with a fresh tune, fuel filter and K&N panel filter (because even if the mileage kinda bites, it sure is alot more comfy to drive that long)...if I could even pick up a couple of MPG's I would sure feel alot better about the cost difference just to pad my fat a.. ! While I certainly don't expect it to come close to what that 'stang did, I would be elated if it would even hit the upper teens. Going to pray for a tail wind both ways and see how it goes.

 

My 95 F150 when I was newer it got about 20MPG on the highway. This truck had a 2.73 gear, 2wd, 5 speed and a inline 6. This truck got awesome gas mileage, and I think that 23 MPG is pretty high, but not completly impossibe...

Matt

 

Ive heard of stock F150s getting 17mpg thats with a standard, 2wd 302, or 300, id kill for that kind of mileage..

the 23mpg... I dont know about that but It could be possible I know 20 is possible,

Ive owned an 88 F150 302 3 speed auto. 11-12 mpg highway, a 95 F250 351 4x4 e4od. 10mpg highway, and now an 88 F350 460 dually ZF m5OD. 10mpg going 75mph on the highway, Imagine if I took it slow...get better gas than my previous kiddy trucks

 

Totally doable my old Bronco averaged 16mpg highway lifted 4" 351 E40d 33" tires 3.55 rear.

 

Ya know its kinda like the arguement bout e-10 gas vs reg gas. Depends on so many factors, wind, tire pressure, size, are u loaded. It sounds unlikely out of a 15 year old pick up, but alot of it is perception

 

I agree the the mpg seems a bit of a stretch. I have basically the same setup as he does and the best I can get is 17 mpg. I usually get about 16 or worse yet 15. My numbers are city/highway mix. I think one time on drive to From Austin to Dallas I got about 18 mpg, but it was cold outside, windows were up and I wasn't driving very fast.

As for the crossflow problem throwing off your figures, that is very likely. I think that 94 was when the crossflow problem is supposed to be remedied, but not sure about that.