06-24-2013, 11:09 AM | #89 | |
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Having had access to a car fleet in Germany, I can say that an E39 525i got 22 mpg at 130+ mph and not much better when staying under that speed. It took ages to get there, but I was always surprised that it returned decent mileage at such high rpm. It would have never achieved over 30 mph like that chart shows, so the taper to 130 on that chart would have you expecting about 1 mpg at 130. |
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06-24-2013, 11:58 AM | #90 | |
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I think that when the N20 can achieve as good numbers as 24-30 mpg doing 75 mph, and especially considering its larger air resistance, it goes to show how fuel efficient a car it really is. |
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06-24-2013, 12:02 PM | #91 | |
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Admittingly, it was 800 plus pounds lighter than the X1. I am impressed with the X1 nearly matching the highway efficiency of our previous N54 135i, up to about 85, where it does seem to start dropping off much more than the 1er did. |
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06-24-2013, 12:34 PM | #92 | |
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Does it have the same twin scroll turbo, or is it a twin turbo? The latter may be more efficient at medium-rpm coasting, but burning more getting there. I also found this, which has data from a 2009 study: http://cta.ornl.gov/data/tedb31/Edition31_Full_Doc.pdf Page 118 (section 4-28) is the interesting one. As expected, it shows a larger drop in fuel economy for small SUVs than for "regular" cars as speed increases, and a drop from 34.3 mpg at 55 mph to 24.5 mpg at 75 mph. That's a quite significant difference. When the esteemed poster here reported 24-30 mpg at 75.5 mph, I think the N20 X1 is rather impressive. |
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06-24-2013, 01:53 PM | #93 |
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The E84 is more of a car than an SUV, BMW even lists it that way on their monthly sales. While it's a little taller than your average car, it's much smaller than even the smallest of small SUV's.
My M Coupe was a Z3 E36/8 with a naturally aspirated, 3.2L I6. Here's something surprising: E36/8 - cd of 0.37 E82 - cd of 0.31 E84 - cd of 0.32 - 0.34 depending on tires and trim Interestingly, the much larger F25 X3 is also listed as 0.34 drag coefficient. Our E82 had the same transmission but the older, less efficient N54 twin turbo motor, and routinely got 28-29 hwy mpg. Interestingly, it got about 16 city mpg while our E84 on the same cycles is returning around 17.5-18.0 mpg. Hwy mpg for the E84 is less than the E82, but still quite impressive. This is a mix of 7k ft city driving and hwy cruising at between 80-88 mph. I also think the report you cited is of little value as only one of those cars, the Mountaineer is even remotely as torquey as the X1 and if I recall it had a pushrod V8 and certainly fewer than 8 gears in the transmission. German cars being geared for the autobahn typically have less of a drop off in higher speed efficiency as they're not being pulled out of their ideal power range when running in high gears, and the extra gears also significantly help out with hwy efficiency. That was primarily why I cited an older E39 getting 22 mpg while cruising at 130+, something not one of the cars in that study could do, regardless of mpg. |
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06-24-2013, 02:07 PM | #94 |
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Grovsnus, I'm really just typing to see the letters, not to argue with you. I don't think we're saying different things, just pointing out that the X1 is reasonably efficient for a relatively heavy and suitably powered car/suv.
Speed will unquestionably lower your efficiency, but I hold that it's a much smaller impact in a typical German car than it is in something like an F250 pickup or a sedan geared to only do 110 mph. |
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06-24-2013, 03:11 PM | #95 | |
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Speaking of the Mountaineer, I have one of the last 302cc V8 Mountaineers in my driveway, and it certainly does have a horrific profile. But it also has a lot of torque, and high momentum, so the drag isn't very noticeable. Well, a drop from 15 mpg to 14 mpg at speed, but who's counting It's such a good workhorse that I just couldn't get rid of it. |
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06-24-2013, 04:35 PM | #96 | |
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It's quite possible for a large vehicle to have a lower Cd than a small vehicle (though most large vehicles happen to be kind of boxy and many small vehicles are aerodynamically shaped.) |
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06-24-2013, 04:42 PM | #97 | |
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06-26-2013, 03:48 PM | #99 |
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06-26-2013, 05:55 PM | #100 | |
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If BMW modified it to run on the much lower grade US diesel, it would likely be around 45 mpg. Which is still impressive compared to most US cars, so it's a shame that there are so few diesel BMW models to choose from. The flip side of the coin is that in the UK, there aren't a lot of petrol versions to choose from. |
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07-15-2013, 11:23 AM | #101 | |
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does the car really perform better broken in? ....
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I'm sure fuel efficiency gets worse with the sunroof and windows open, but what's the point of having them if not to use them! Overall, I'm happier with this than the convertible, but bear in mind, the gas tank does hold 10 liters more in gas ... so is there really a savings? I was really sold on the fuel efficiency of this car, and so far it hasn't really impressed me with THIS aspect of the car considering the advertising is for much lower than what I'm getting .... and when is my engine considered broken in? I have just over just under 6,000 km now? |
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07-15-2013, 01:31 PM | #102 |
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With the coatings in new engines, it won't be broken in until probably almost 20000km or so.
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07-15-2013, 02:31 PM | #103 |
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I am curious to hear about gas mileage (fuel efficiency) from those living outside of the U.S. with their sDrive20i (petrol/gasoline operated engine).
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08-13-2013, 10:43 AM | #104 | |
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The road trip I last took was over 300km one way, but I only got 11.6 l/100km. How do I get it down to 8.1 l/100km? I'd be happy to get it to 10 l/100km! |
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06-03-2014, 10:05 PM | #106 |
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1. How you drive affects your fuel consumption by a lot
2. Where do you drive often, highway or city 3. Traffic? Drove BMW X1 sdrive 18i, just got in a month, at first I got 13L/100km (18.09 MPG US) on average, then I reset the counter and changed the way i drove to be more fuel efficient and now I am getting 11.2L/100km (21 MPG US)! This is my first BMW so I'm not sure if its just X1 or BMW engineering in general, I noticed that X1 is really good at "gliding", and gets really fuel efficient when it reached > 50km (> 31 Miles), and on highway you could get much better millage. But when you are stuck in traffic that's when you are burning lots of fuel. I reset my counter while i was in heavy traffic and got really bad mileage 39.5L/100km (5.95 MPG US), it was horrible. Try changing the way you drive: 1. Gas slowly, better to gas while you are going down a hill than when you are going up. (do not overtake while going up a hill) 2. Try to "glide" as much as possible. Good luck! |
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06-04-2014, 03:49 AM | #107 |
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On a 5 day tour of Bavaria in "normal" mode we got 25.4 MPG. Not bad considering how much of the driving was on unrestricted Autobahns and in the mountains.
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06-04-2014, 09:21 AM | #108 |
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Drove from NYC to Boston MA, 450 miles round trip, in a 2014 328i Xdrive, averaged 28.6mpg using comfort and sport mode, very spirited driving with radar detectors on all the time.
Drove from NYC to Cape Cod, MA, 480 miles round trip, in a 2014 X1 28i Xdrive, same route, same driving style, 19.9mpg. Same engine, same transmission, and the X1 28i sucked big time compared to the 328i in fuel consumption. Both cars were equally fun to drive. |
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06-09-2014, 09:54 PM | #110 |
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fuel mpg
i have a 2013 x1 35i msport with 19" wheel option. about 11k miles on the car. i drive half conservative half aggressive, im avg 19-21 mpg all around. got as high as 26 on a trip to los angeles. mpg im not worried... this is a bmw. it puts a shit eating grin on my face everytime i get behind the wheel.
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