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      04-07-2013, 10:06 AM   #1
Leekay07
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My MPG is way off.

I went for a road trip on I84 to CT this weekend and my average MPG is <24Mpg at 65MPH.

Somewhat way short of the 33mph highway stated on the window sticker. Saturday was clear no traffic jams or anything so its not stop go traffic. But I am at a loss why they have such high contrasting number. The gas is summer blend and not the winter crap as my 335xi has been doing 30+ MPG
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      04-07-2013, 10:20 AM   #2
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Tire pressure?...winter tires?
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      04-07-2013, 10:59 AM   #3
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the window stickers are just an estimate. you'll never see those numbers. there are so many other variables that which can cause you economy to be lower. as stated above, tires, tire pressures, type of road material, elevation of the road, wind etc etc all will cause our mileage to go down. also, how broken in is your engine?
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      04-07-2013, 01:26 PM   #4
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You're not alone in your disappointment. If you search you'll find threads discussing this rather controversial topic. It's been discussed on the Bimmerfest forums as well.
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      04-07-2013, 03:29 PM   #5
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Don't forget hills. If you turn on the dynamic MPG display, you'll see that even a mild incline can drop you from 35 to 10-15 mpg, or even less if you have passengers or cargo.
EPA estimates are for a vehicle with a 165 lb driver, flat terrain, no passengers or cargo.

And I84 from NY to CT is very hilly. No chance of getting anywhere near the EPA estimates.

The drop is even more severe for the 28i than the 35i.

Last edited by Grovsnus; 04-07-2013 at 04:46 PM..
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      04-07-2013, 04:47 PM   #6
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I see so many threads like this and am so glad I got the 35i. I drive that exact route all the time in my x35i and maintain a consistent 24+mpg at 85mph. On a highway trip from OH to CT I averaged 23.7 mpg with many trips into the triple digits (majority of the trip cruising around 90mph) and all through the mountains of PA. If I drive 65mph I can average 26-27mpg if I drive like a grandma.

Last edited by paradoxical3; 04-07-2013 at 04:54 PM..
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      04-07-2013, 04:53 PM   #7
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My mpg's are normally 29.7 or 30.1. Not bad and mostly interstate with some stop and go traffic.
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      04-07-2013, 05:22 PM   #8
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Quote:
Originally Posted by paradoxical3 View Post
If I drive 65mph I can average 26-27mpg if I drive like a grandma.
Not my grandma - in her mind, her car had two gears: first and second. When she redlined first, she would change to second.

She was religious about keeping the service book updated, though. The poor gas boy couldn't add a quart of oil without writing it in the book.
(Yes, youngsters, gas station attendants really used to check the dipstick and add oil if needed. And always wash your windshields, wipers and headlights. Thus service stations.)
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      04-07-2013, 07:45 PM   #9
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My 335xi can do way better with the same people in the car.
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      04-07-2013, 08:20 PM   #10
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Quote:
Originally Posted by Leekay07 View Post
My 335xi can do way better with the same people in the car.
Well, yeah - it's got a bigger engine than the X1 28i, and doesn't have to work that much harder in hilly terrain or with extra passengers. It's also lower, with a lower drag coefficient, which matters at interstate speeds.
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      04-07-2013, 11:09 PM   #11
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FYI the EPA conducts their mileage tests at 55 mph and only use 100% fuel (ie 0% ethanol).

Find yourself a "no ethanol added" service station fill up a few times then conduct a test with about 50 miles of flat highway driving 55 mph with no lane changes.

More and more car companies are understating their EPA estimates in wake of Hyundai's fiasco but BMW...not so much it sounds like.

Weather conditions and elevation also play a pretty part in fuel economy. You want sea level elevation and cold dry air. That is the densest air without water vapor meaning it is the best for combustion.

Also as others have said, check your air pressure in tires and whether or not your fuel has winter season additives.

Driving with the sunroof open also lowers fuel economy as does running the AC (up to 15% loss in mpg by running AC).

Oil viscosity also affects fuel economy as more viscous oils are less fuel efficient although more lubricative.

Wind plays a major part if you are consistently driving into a headwind during a road trip.

Bottom line - turn on ECO Pro and drive 55 mph without AC on no ethanol fuel on a calm day and you should see the advertised EPA figures.
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      04-08-2013, 06:48 AM   #12
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Quote:
Originally Posted by Ex-One View Post
Driving with the sunroof open also lowers fuel economy as does running the AC (up to 15% loss in mpg by running AC).
And keep in mind that if it's cold enough outside that you use the heater, and you have the A/C button lit, it doesn't mean it won't do anything. The X1 will cool down the air further before heating it up again. That's good for reducing humidity in the air, but not so good for fuel economy.

Quote:
Originally Posted by Ex-One View Post
Bottom line - turn on ECO Pro and drive 55 mph without AC on no ethanol fuel on a calm day and you should see the advertised EPA figures.
Also make that the recommended octane number fuel (for the X1 that is 91), a driver who weighs 165 lb or less, no passengers or cargo, and no hills.

Last edited by Grovsnus; 04-08-2013 at 06:54 AM..
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      04-08-2013, 06:53 AM   #13
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Quote:
Originally Posted by Leekay07 View Post
I went for a road trip on I84 to CT this weekend and my average MPG is <24Mpg at 65MPH.

Somewhat way short of the 33mph highway stated on the window sticker. Saturday was clear no traffic jams or anything so its not stop go traffic. But I am at a loss why they have such high contrasting number. The gas is summer blend and not the winter crap as my 335xi has been doing 30+ MPG

You have "THE" answer to your question on YAHOO.COM this moring:

http://autos.yahoo.com/news/here-s-w...175746134.html
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      04-08-2013, 10:58 AM   #14
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Sorry to bore those who read the "other" forum too but here's my contribution on the MPG topic:
Update on my MPG (sDrive 28i) - I am just over 4k miles. I only reset tripometer. My average speed since purchase is still in the low 30s (Los Angeles resident). My average MPG since purchase is now around 27.3. So creeping up on the target "28" figure. For the first 1000 miles or so I didn't use EcoPro much, but now I use it for freeway driving and sometimes in city/street driving. Maybe it doesn't save me all that much gas, but I feel as if I have more than enough power, and gas prices being what they are, why not burn at least a little less? By the way, I find myself mostly filling with 91 but sometimes using 89 as well. Had at least one tank of mostly 89 and X1 ran as well as ever, I felt.
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      04-08-2013, 03:32 PM   #15
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I have the sDrive 28i with less than 500 miles on it and drove it from Oakland to Napa which is an hour drive and got 34 mpg (Eco Pro on). The first few miles were downhill so bit of advantage there, but the rest was level freeway, going 65-70 mph. Drove around Napa for about 20 minutes, regular city traffic. On the way back did about 70% freeway; 30% city, as I exited in Berkeley to run an errand and was in lots of stop and go traffic for about 30 minutes.....got back on the freeway to go back home in the hills (so a few miles gradual climb).

The combined round trip averaged 27.x mpg, so seemed reasonable given the time spent driving in the city.

As the car breaks in, I'm optimistic I'll be able to get the 34mpg with freeway driving, and hopefully more. Right now, City driving seems to average around 21 mpg, so bit short.

I previously had a 2006 M3 that reliably got 27-28 mpg on the freeway, and averaged 20 in the city. I recall the sticker had said it was 14 city; 19 freeway. I got way better mileage than advertised....and I had to pay gas guzzler tax!
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      04-08-2013, 11:37 PM   #16
Leekay07
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BMW USA Lee, Fuel Economy Values are developed based on standardized test cycles mandated by the EPA and apply to all manufacturers who publish EPA fuel economy labels. The X1 xDrive28i has an EPA Fuel Economy of 33mpg Highway and 24mpg City. Depending on individual driving behavior (acceleration, average speed, etc.) and average commute, actual consumption may vary.
13 hours ago · Like

Lee Kay well then what do I need to do to get 33 mpg? One way trip over the White cliffs of Dover in England, free roll down pikes Peak or let if run over the grand cannon and check the MPG at the bottom?
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      04-09-2013, 07:59 AM   #17
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Quote:
Originally Posted by Leekay07
BMW USA Lee, Fuel Economy Values are developed based on standardized test cycles mandated by the EPA and apply to all manufacturers who publish EPA fuel economy labels. The X1 xDrive28i has an EPA Fuel Economy of 33mpg Highway and 24mpg City. Depending on individual driving behavior (acceleration, average speed, etc.) and average commute, actual consumption may vary.
13 hours ago Like

Lee Kay well then what do I need to do to get 33 mpg? One way trip over the White cliffs of Dover in England, free roll down pikes Peak or let if run over the grand cannon and check the MPG at the bottom?
Lol check it at the bottom!
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      04-09-2013, 11:17 AM   #18
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Has anyone tried running in M7 rather than 8th for a fuel mileage run? Just a thought that the engine may not create quite enough power at super low RPMs to break drag and friction etc. I'm willing to bet that at the slightly slower highway speeds (55-65) that fuel economy will increase with that little bit more power made. Someone try it, and let us all know if it differs.
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      04-09-2013, 12:39 PM   #19
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Quote:
Originally Posted by Leekay07 View Post
BMW USA Lee, Fuel Economy Values are developed based on standardized test cycles mandated by the EPA and apply to all manufacturers who publish EPA fuel economy labels. The X1 xDrive28i has an EPA Fuel Economy of 33mpg Highway and 24mpg City. Depending on individual driving behavior (acceleration, average speed, etc.) and average commute, actual consumption may vary.
13 hours ago · Like

Lee Kay well then what do I need to do to get 33 mpg? One way trip over the White cliffs of Dover in England, free roll down pikes Peak or let if run over the grand cannon and check the MPG at the bottom?
It's already been answered here, but here's a recap:

1: Use the recommended fuel (in this case, 91 octane (RON+MON)/2)
2: Drive alone, no cargo or passengers
3: Weigh no more than 165 lbs
4: Drive on flat terrain
5: Drive with windows and sunroof closed
6: Turn off A/C
7: Do an average of 48.3 mph and never dip below 30 mph or exceed 60 mph

See http://www.fueleconomy.gov/feg/how_tested.shtml for more information.

Last edited by Grovsnus; 04-09-2013 at 12:51 PM..
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      04-13-2013, 11:19 AM   #20
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Averaging about 25-26mpg at 81mph (130kph) on the Autobahn. Goes down to 21-22mpg at 100mph sustained.
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      04-14-2013, 08:10 AM   #21
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Quote:
Originally Posted by Ex-One View Post
Weather conditions and elevation also play a pretty part in fuel economy. You want sea level elevation and cold dry air. That is the densest air without water vapor meaning it is the best for combustion. ...
The above quote is somewhat inaccurate. Yes, sea level air density is best for maximizing POWER, but not fuel economy. Here's why, higher altitudes with lower air density will be noted by the fuel delivery system and in order to maintain proper fuel/air ratios will REDUCE the amount of fuel delivered to the cylinders. Turbocharging does compensate somewhat but cannot make up the total difference, it is relative in any case as the turbo is in use both at sea level and high altitude.

Living at 7000 ft. I've studied this effect in all the cars I've owned and categorically, forced induction or not, they all got slightly better fuel economy up high than at sea level. They just weren't as fast :-/

Our new X1 28i is at 28mpg average after 1000 miles with three trips of ~125 miles the rest in town.
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      04-14-2013, 10:28 AM   #22
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Quote:
Originally Posted by Grovsnus View Post
It's already been answered here, but here's a recap:

1: Use the recommended fuel (in this case, 91 octane (RON+MON)/2)
2: Drive alone, no cargo or passengers
3: Weigh no more than 165 lbs
4: Drive on flat terrain
5: Drive with windows and sunroof closed
6: Turn off A/C
7: Do an average of 48.3 mph and never dip below 30 mph or exceed 60 mph

See http://www.fueleconomy.gov/feg/how_tested.shtml for more information.
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