Belize Off Road Team

Very True 24Runna. I'm not sure what happens with a lower gear ratio with bigger or smaller tires, i know i have the stock 4.11:1 Ratio with the manual transmission and i either run the 265x75R16 for traveling and looks or i also run my older 31x10.50R15 Pro Comp Xterrain for traction and i still get the same fuel economy, not sure why but i do.

Brenjen

4th gen? .............BORT & I both have 2nd gens; although his is a hilux mine is a damn site closer to his in comparison than a 4th gen truck OR 4runner. I'd consider the model & year a bigger factor than gears & tires lol


Yes gears & tires are a factor. My ratios are well known already, bone stock 4.88's & 31's that's why I forgot to mention it & since I wasn't trying to put together a definitive list I.E. "this is all that matters" it's irrelevant. Especially against a totally different vehicle...4th gen? You might as well compare apples & oranges.

Belize Off Road Team

Another thing that probably but may not boost my fuel economy is that i have no cat and no muffler there for no resrictions and added power and maybe even fuel economy (i did see a boost after i had them removed).

ccannon222

I get 17 MPG with stock 3.0 Auto with a recenlty rebuilt motor and 115K on trans. I have 4.88 and 31's at 35 PSI. I could see low 20's with a 3.0 manual trans 4runner with all highway miles around 60 MPH.
I also get 23 MPG in an 85 4R, 33's, 4 inch lift, LC exhaust, 4.56 gears, manual trans and 190K.

ccannon222

24Runna

I was saying that in response to the newer cars and how they get better MOG in the 2k - 3k range.



See above.

On the way to Wisconsin we had the back to the ceiling with cargo and wood, and 4 guys in there. On the way up I was doing 65 - 75, and still ended up with 18.23, using Shell gas, 87. If I had gone 55 and without the load surley at least 20 MPG is achievable. BTW, I have 4.88 gears and 31x10.50x15 tires.

88alltrac

i have a bone stock 2nd gen 3vze. 31x10.5 tires. whatever the stock gearing is.
going 80mph i get about 17mpg
going 70mph i get about 19.5mpg
around town i get about 17-18 mpg
i have never driven 55ish mph. i am in to much of a hurry.
ohh and just over 300k miles on it. nothing rebuilt.

Brenjen

You said a 4th gen is what you have & I'm saying your 4th gen doesn't apply since it's a totally different type of vehicle regardless of what gears or tires you're running as it pertains to 2nd gen 4runner/Hilux fuel mileage. They're totally unrelated. My parents Cobalt gets 30+ mpg; I think they could run on flats & get better mileage than me.

What you were saying in response to what I still don't know

I agree that tire size & gearing makes a difference all other things being equal.

24Runna

Aha! Found it. The post I was referring to was post #12.

The 4th gen I don't use, it's my mom's.

I have a 2nd gen. Which is what I took to Wisconsin.

When I made the original post I was referring to bigtrucknwheels comment about top gear putting you in between 2k -3k at 55 MPH (for most vehicles).

Brenjen

Gotcha' chief - it's all good. My mistake - you were right, I was wrong. You are smart, I am stupid. (I'd attempt to go on a while so it'd be funny(er) but I haven't had any coffee yet this morning)

I still can't help but wonder how some people get such good mileage & swear by it, while I get a little over 16mpg on a good day with what amounts to identical rigs minus maybe a little gear in the back or tire pressure. Something is up; I would suspect my O2 sensor but I'm not getting any codes & far more people have mileage in line with me than with the 20+mpg people.

Belize Off Road Team

Automatic vs manual may be a big factor in fuel economy? or maybe there was something they changed in the 90/91 to the 92-95 4Runners? i know they added side protection so there for more weight. along with bigger headllights so less air flow for the intake. And maybe there are other factors are play that we just don't see or think about.

Brenjen

I know the tranny difference is big factor between the two of our trucks I think it was even mentioned already, but not a 10mpg factor.

Belize Off Road Team

Well then it is a real head scratcher then. Maybe the tread pattern makes a difference? Maybe there are other parts that arent as worn or are newer that would effect fuel economy?

Redeyejedi

25km/m?

24Runna

Brenjen. My stock truck is also a '95 with nearly the same setup. I have the 4.88 gears, and 31x10.50x15 tires and auto tranny.

Deviating from stock, I have done the ISR mod, drilled holes in my air box, made a custom intake out of 3" PVC, took off intake director thingy, use Mobil1 synthetic fluids(High Mileage), use mainly Shell gas with up to 10% ethonal, full tune-up done a few thousand miles ago using NGK and OEM parts.

On the way to Wisconsin, like I said, was with about 500 lbs of additional weight, at 65-75, and still managed 18 MPG.

I would say a diagnosis is in order for you. lol.

bigtrucknwheels

just got back from a trip to West Virginia, all highway traveling at 70-90, usually right at 75-80, and I got 20.2 going down and 19.7 coming home with the bed full of gear, behind the seats full of gear, and a passanger plus my fat arse.

I would say if you aren't getting 17 on your mixed driving at a minimum, you need to start looking at why you aren't. bearing drag, tire drag, aerodynamics (my Lund MoonVisor absorbed a whole MPG of fuel, on average...), engine condition, driving habits (not just speed/acceleration, but waste of momentum and long periods at idle), and of course, gears and tires. just my $.02 seems that the crowd around here that gets poor fuel economy speaks up, one or more of the above listed things accounts for the fuel economy.

I wouldn't expect you to get 25MPG with an autotragic and 4.88s. and if he has 4.10's with 31's, and a 5 speed, that decreases revvs, which if you don't need to accelerate, is fine. cruising at 1500 will yield good economy, until you start trying to accelerate.

Brenjen

Ours are nearly identical down to the plugs & oil. But mine is stock, no ISR holes or drilling or mods like that.

Well I know it isn't bearing drag, new bearings installed by me recently. I know it's not tire drag as I have them inflated to the full 50 pounds. The aerodynamics on mine are stock, no visors or bug guards or anything. My engine is in average shape for 200K, maybe even above average. My driving habits are also average, I don't floor it unless I'm going up hill or passing & absolutely have to do it. I also don't idle for long periods; if I'm waiting on someone for more than 30 seconds I shut it off.

A faulty O2 sensor is the only thing I can see causing such a large difference in fuel economy & if that's the case then there are many people right here on this very board with faulty O2 sensors.

24Runna

When I get the monies I'm going to get a new o2 sensor.

Also, what is usually the max rpms when you accelerate?

Also I noticed hat there is a difference when I removed the muffler and then the cat. There was a noticeable difference running straight pipes, also in terms of MPG.

Victor

I used to get 22 on the highway with 31's. When I went to taller tires it dropped to 19. Then came the lift which caused more wind drag and blah blah blah. Mostly city driving now and its always over 16.5. The 3.0 is a pretty good little engine that gets no credit but it was designed with a different philosophy than most American car companies.

bigtrucknwheels

I believe it, but by mixed driving, I mean 50/50 highway/city, and my city driving is different than yours, I'm sure, but on the highway, you should be able to gain some ground... odd that you don't, check out the 02 sensor..

Belize Off Road Team

to get 25MPG i dont rev over 2700RPM

And i too noticed a big gain in fuel economy when i removed my cat and muffler.