bigbluejk

hold up... 28mpg??? You do know it is miles / gallons = mpg... right?

jtjk

x2
i have a 2dr, drive it like a grandma on the street and get 16.8mpg MAX......... i dont think he's to good at da maf

JKlad

Yep, thats correct. And though I'm in a metric country, I do know how to use a calculator and I grew up using MPG and other imperial measurements anyway as we only switched to metric here in the mid 70s (to this day, most people here will know their height in feet & inches but their weight in kilograms, wierd). I converted the figures so they mean more to the majority of people here who are in the US than saying, for example "I get 9L/100km & 650km to the tank and cruise at 105km/h at an average 80m above sea level".

Mind you, they're real world figures for highway (my readout on the dash says 30-31MPG but the computer is notoriously innaccurate, so I reset my tripmeter at fill-up & calculate that way) and by highway I mean reasonably flat and straight country roads and freeways roads near sea level & 55-65MPH. I know as soon as you go above 70-75MPH the drag really starts to affect mileage, as does climbing hills/mountains at operating at higher altitudes. On a 3000mile round trip I did a while back I averaged 24MPG onroad for the trip; Jeep was fully loaded with jerry cans and camping equipment and included a fair amount of hilly terrain and 70-80MPH for periods . I also use premium (mid-octane) unleaded, as the JK pings & rattles like a tin can full of marbles under even the lightest load if I use regular unleaded & gets noticably worse mileage as well. Many threads here have discussed how though Chrysler specifies low octane unleaded, in reality these motors do better on higher octane stuff.

As I said, mine's a stock 2-door 6 speed with 3.21s and the Rubi spec wheels & tires (255/75R17 Goodyear SA A/Ts) and I run the tires at 40psi on the road specifically to improve my mileage; trust me, it makes a huge difference over running them at 28-30psi. So though I may suffer in performance in other areas compared with diffs fitted with the lower 3.73s & 4.10s (ie crawl ratios, accelleration), economy is where I win with the 3.21s, particularly with the lighter 2-door & 6-speed.

I also have a hardtop. There has been discussion here & on other forums that though the soft-top is lighter it is less aerodynamic that the HT & thus creates noticably more drag at highway speeds (something to do with the bump the soft-top frame creates in the roof, causing dips in the canvas?)

If I completely thrash the guts out of it in city driving & drive it like I stole it yeah, I'll get 15MPG too. Week in, week out I get 400miles out of a tank doing my daily commute (30% city, 70% highway).

Bengt18T

We have a 4dr sport automatic since it's the old lady's primary daily driver. If it was for me, and we didn't have a little one on the way, I'd have a 2dr Rubicon 6spd.

bigbluejk

I was j/k about the math. You have a secret to it or something? That is like twice what I get.

D0ppleganger

i've got a 2 door rubi and love it, only time i regret not having a 4 door is when i want to go somewhere with more than one friend.

and what's this about 28-31 mpg? BS.
on chrysler's sticker they only rate it 15-19. no way you are getting that good unless it's a diesel. i drive mine like a granny on road trips and max i've gotten is 16.5 (17.4 on the readout). I'm at sea level as well. even when i run high octane (which i did try) fuel economy only increased like .5 mpg.

JKlad

Maybe you didn't read my previous post where I said my real world highway MPG (calculated) topped at 28; as I said, the computer read 30-31 but these figures were wrong as the computer is notoriously innaccurate, 28 being the real figure. Also I'll state again that I drive a stock Sport (similar to the US Sahara) with 3.21 Ratios, NOT the Rubicon with 4.10 diff ratios as yourself and some others who disbelieve me drive.

The taller ratios really do make quite a difference to on-road fuel economy, particularly on the highway; at 70MPH my motor isn't even spinning at 2000RPM, so obviously it is burning less fuel than a Rubicon with 4.10s does at the same speed as the Rubi motor is working harder (ie: revving faster) & doing 2800RPM to achieve the same speed with the lower 4.10 ratios.

The pic below is the sticker that came on my JK. The figure of 11.5 Litres per 100KM is equivalent to 20.7 MPG (US) and this is the combined city-highway figure quoted, not pure city or pure highway (I don't know what figures are on the stickers for US-sold JKs), so just by looking at this 20.7 MPG figure alone you can see that MPG pure-highway consumption figures in the mid 20's are to be expected when you take the city figures (which are about 17-18MPG) out of the calculation.

And with a fully loaded JK on a hilly highway with speeds between 60-80MPH the whole way, as I stated earlier, that's exactly what I averaged on a long trip; 24MPG. The 26-28 MPG figure I have also regularly achieved is at slightly lower speeds under 65MPH, unloaded, on fairly flat highways and tires inflated to 40psi.

The Rubicon's lower diff ratio, combined with the lower low-range ratio in the transfer case, really kicks ass offroad and combined with the front & rear axel lockers & front swaybar disconnects makes the Rubi an excellent rock-crawler and the best "out of the box" offroader available. However the trade-off is that onroad they use more fuel than stock Xs & Saharas with the 3.21s; fact of life.

terribad16

I would defiantly go 2 DR... That's what I have and the only thing I don't like about it is the little baby tires on it (I have an x)... But since you're getting a rubi then you don't have to worry about that, and also like stated earlier those things already look sexy, and with just slightly bigger tires and lift it'll look even greater and perform awesome off road.

pontiacstogo

I'm guessing he's referring to imperial gallons not US gallons.

2 door, 4 door - I'd like one of each . But if I had to pick just one, I'd go for the 4 door.

RAINSTATEBEAR

4 door here. Love it soooooo much