[aztec31]

What type of MPG should I be expecting for a X3 35i (US model)? Would I at least get mpg 26+ at 75mph on the freeway?

[alexg62]

It will be close. I get about 25.6mpg in 75-80 mph driving.

[vrrooom]

I consistently see 27-29 on the interstates, on trips of 250-350 miles. Aside, the dealer gave me a new 2.8 x3 as a loaner the other day, and in the EcoPro mode it was no better than my 3.5, it was brand new, so it might get better with more miles.

[rmbs16]

Originally Posted by vrrooom

I consistently see 27-29 on the interstates, on trips of 250-350 miles. Aside, the dealer gave me a new 2.8 x3 as a loaner the other day, and in the EcoPro mode it was no better than my 3.5, it was brand new, so it might get better with more miles.

MPG depends on your driving habits and the roads in your area. There are too many other factors affects the mileage including passenger/cargo count and weight, altitude etc. On the average 35i should do 2 mpg less based on the rating. Interestingly I find that my 28i gets 31 mpg in the local road when the speed is maintained at 35-40 mph with couple of traffic light and eco mode. n highway at 70-75 miles it gets 27-28 mpg. Note that it is within break-in period.

[mibmwx3]

I only average 22-23 mpg in mixed driving, but I have a heavy foot. This is actual mpg. The computer normally shows 1-2 mpg higher. One of these days, I'm going to try driving like an old lady to see what type of mileage I can get. The main reason I chose this vehicle was because it was so much fun to drive not because of the gas mileage.

[noka]

Don't know about current BMW's (owned several various models from '96 to '06) but I always found onboard computer to overstate by a couple of MPG and the only way to measure accurately was by using odometer and gas pump volume. Same with my current '09 MB.

[lbjgh]

I drive 80/20 city/highway and the car is averaging 11.1 L/100km.

[DonC]

I have registered 32.7 mpg at 64 mph on a trip to Portland Or. Once the spped limit changed to 70 mph my mpg started to drop. I set the cruise to 74 and even stop and go traffic in and out of Portland I averaged 27.7 for the entire trip. I have about 10 K on my X3. Mileage is much better than my 95 4Runner!

[Want the thrill]

I get 27-28.5 on the highway and 22.5 with city driving.

[Amber]

The 35i along with the 8 speed tranny is a real fun to drive package. More fun means less mileage but its worth the price.

[alexg62]

Posters with 27mpg or higher. I don't how you get that kind of mileage with speeds of 75mph or higher.

Just did 300 miles on PA turnpike from Philly to Pittsburgh (was going 75 on cruise control where possible). Temp outside was 27F - 44F. Trip computer registered 25.3 mpg with avg speed 72.

I have 8,000 miles on my X35 (M-sport with 19in tires). Perhaps MPG will get better over time.

[carlili4190]

My 35xi is averaging 14.1 MPG All city driving

[faztaz]

Im getting 18.2 with mixed city and highway (with a heavy foot at times).

[mspringer]

I recently took my X35i on 6000 mile trip touring thru the US west. At 75-80 I consistently got 27mpg on fairly level ground. However, mileage is really dependent on speed and wind conditions as the X3 is a bit of brick, and also on tire pressure and I'm sure road conditions. On a similar trip with first generation X3 mileage varied from 30 or so at 60-65 down to 22 at 80-85. Fuel mileage on the new car is about 2 mpg better. In general, it been my experience that BMWs exceed their highway ratings - this has been true on both of the X3s and the 3 M3s I've owned.

The accuracy of the computer varies somewhat from car to car. In my 35i the discrepancy is only ~ .1%. In the first gen X3 I remember reading about a way to adjust the computer (never tried it myself) and perhaps that's possible in the new car as well.

[raleedy]

Somewhere between 14 and 30.

[punch1118]

Originally Posted by carlili4190

My 35xi is averaging 14.1 MPG All city driving

I'm getting 15.4 driving to starbucks and running errands
but on the highway it bangs out 26-28 mpg

think I better go back to my scooter (100mpg honda met) or better yet WALK to the coffee shop as I'm loosing all my stars driving the X3

[Max Well]

A year ago I researched this, and if you look at the graph at the end of the thread "Horsepower & Speed - the Graph" [ http://x3.xbimmers.com/forums/showthread.php?t=1004702 ] it shows the data I obtained from our two X3 35i xDr. As others have indicated, many factors go into the final numbers you derive for your own driving environs. Our 'sweet spot' would be to travel around 45-50 mph on level plane.

[pookguy]

Primarily city driving. Just hit 1500 miles and I average 15.83 mpg.

[Peter_R]

To get a realistic overall mpg figure, go to Fuelly.

http://www.fuelly.com

[Austin_Bo]

Digging up an older thread, but I'm curious about some posters' figures. It seems that many of you are experiencing highway figures in the mid-upper 20's when on the highway. I have about 1,200 miles on the OD, and I'm averaging 19 mpg. 80% of my driving is on the highway where the cruise is set to 80. Does the motor need more time to break in?

[MichiganMike]

Originally Posted by Austin_Bo

It seems that many of you are experiencing highway figures in the mid-upper 20's when on the highway. I have about 1,200 miles on the OD, and I'm averaging 19 mpg. 80% of my driving is on the highway where the cruise is set to 80. Does the motor need more time to break in?

I have 6,000 miles on my 2016 X3. The gas mileage I observed improved after a couple thousand miles. My overall average over the last couple thousand miles in mixed driving (70% highway, mostly at 70 to 75 mph) is 24.3 mpg according to the trip computer. Driving at 80 mph, lower quality fuel, cold weather and hilly terrain may reduce fuel economy. I would expect fuel economy of 24 mpg or better at a steady 80 mph on a level road after break-in.

[Max Well]

Originally Posted by Austin_Bo

Digging up an older thread, but I'm curious about some posters' figures. It seems that many of you are experiencing highway figures in the mid-upper 20's when on the highway. I have about 1,200 miles on the OD, and I'm averaging 19 mpg. 80% of my driving is on the highway where the cruise is set to 80. Does the motor need more time to break in?

As mentioned in my 5 Sep 2015 reply above, a host of variables come into play for gas mileage results. Aside from the more obvious variables of speed, vehicle load (weight), altitude, and grade, even driving style (coasting to stops vs braking through a short distance) can affect mileage. I usually average slightly better miles/gal better in my 2012 X3-35i than my wife in her 2015 X3-35i LCI over the same routes, but even that doesn't take into account differing traffic conditions such as stop/start frequency and duration of stops we may encounter along the way. I'm reattaching the formal graph of our two X3 35i's performance curves here (same as posted in my 'Horsepower & Speed - the Graph' thread) just as a reference for our two X3s.

If you can calculate your mpg strictly for your highway cruise time and then separately for your city driving it might assist you in sorting out the actual impact of each style.