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BMW 3-Series - AWD or RWD?

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Comments

  • shiposhipo Posts: 9,152
    I'm thinking that with a commute of less than five miles either way that there's no way you're going to see the EPA average for city driving. The sad fact is that engines need a couple of miles to fully warm up, and until they do, their mileage will sucketh much.

    Best Regards,
    Shipo
  • cdnpinheadcdnpinhead Forest Lakes, AZPosts: 3,237
    ". . .engines need a couple of miles to fully warm up. . ."

    Well, I'm sayin' it's way more than a couple of miles.

    Having had an oil temperature gauge in a couple of cars, I learned that it can take from 30 to 60+ minutes for the oil to reach equilibrium. The 60+ minutes piece has to do with driving in the winter in Edmonton, where the temperatures are routinely well (as in way) below zero.

    Even today, when I rent GM sleds from National, there is a readout selection that lets you look at the transmission fluid temperature. I consider that a reasonable analog for engine oil temp, and it takes at least 30 minutes to reach stability, and that's with highway speeds. Around town. . .

    In-town driving kills fuel mileage, especially when it's cold outside.
  • lovemyclklovemyclk Posts: 351
    May I recommend spell-check?
  • circlewcirclew Posts: 8,353
    What is your tank to tank mileage? My 330xi averages 21.5-22 per tank mixed 75/25% Hwy/City. 25K on the clock now.

    Regards,
    OW
  • habitat1habitat1 Posts: 4,282
    It so happens that I was golfing yesterday with a friend that owns a 2002 330cic convertible. They moved last year and he now has a 32 mile one way commute, about 25 miles of which is 60+ mph highway and the rest stop and go suburban (not city) roads. He keeps meticulous mileage records and over the past year (18,000 miles) has averaged right at 25.0 mpg. On pure highway trips of 200+ miles, he has gotten as high as 33 mpg, but averages about 29-30. These figures are all about 1 mpg better than my 1995 Nissan Maxima, which is pretty impressive, since I think the BMW weighs about 300- 400+/- lbs more than my Maxima.

    P.S. He has a hardtop that he uses between November and March, but uses a beater SUV in very cold or snowy weather. Also, his car is a 5-speed manual (as is my Maxima).
  • circlewcirclew Posts: 8,353
    My problem is my speed on the hwy side of things is well north of your freinds and the xi heft/drag thing.

    Your friend gets a 13.6% efficiency advantage due to the drive train differences and his driving style. Very impressive for a BMW of recent vintage. I am sure the older models of the 3-series were/are higher m.p.g. due to the weight advantage but given 3,500 - 3,700 lbs., technology moves ahead.

    I can just imagine what these drive trains are capable of with 500 lbs. shaved off the package! HMM...I smell 1 series, stripped, however!

    Regards,
    OW
  • habitat1habitat1 Posts: 4,282
    My problem is my speed on the hwy side of things is well north of your freinds

    I should have stated that the speed limit on those roads is 60-65. He's a bit more aggressive.

    Which brings up another issue. We've all had it drummed into us that we'd get better fuel efficiency at 55 vs. 65 vs. 75. In my TL 6-speed, I get almost exactly the same, having driven the same highway route in the same weather conditions many, many times. Anything less than 60 mph in 6th gear feels like the car is lugging and I need to downshift to pass. Once I go above 75-80, efficiency drops slightly, but it appears that the sweet spot on that car is around 72-75. In the case of my 911S, my best ever highway tankful was a 360 mile trip at an average speed of 76 mph (80+ much of the way) in which I averaged 27.8 mpg (vs. EPA of 25). At 65-70 I average 26-27.

    I think many/most 6-speed manual transmissions are geared for peak efficiency in the 70-75 mph range, not 55.
  • circlewcirclew Posts: 8,353
    For a hwy-only trip only, 330xi mpg is 26-27. With no traffic, I have reached a best of 28.

    Not bad for an AWD sled!

    Regards,
    OW
  • shiposhipo Posts: 9,152
    "I think many/most 6-speed manual transmissions are geared for peak efficiency in the 70-75 mph range, not 55."

    Both of my 5-Speed manual equipped BMWs had their sweet spot for mileage somewhere north of 70 as well. My 2002 530i would do about 31 mpg at 75 while my 1999 328i would get more like 34-35 mpg at those same speeds. ;-)

    Best Regards,
    Shipo
  • circlewcirclew Posts: 8,353
    What was your combined MPG and what do you think you average over the life of ownership of the 3 vs. the 5? I think the weight differences from today's cars are 300-500 lbs, 3-series, 5-series, respectively. Correct me if I am wrong, please.

    Regards,
    OW
  • fedlawmanfedlawman Posts: 3,118
    Here's something scary I never bothered to look up. The 335i weighs 3594 lbs and the 535i weighs 3660 lbs.

    I had no idea - the 5 series is only 66 lbs heavier! :cry:
  • shiposhipo Posts: 9,152
    IIRC, the combined mileage on the 328i (less than 3,300 pounds) in NYC metro traffic was about 22 and my life mileage was between 25 and 26. For the 530i (less than 3,600 pounds) I also got about 22 in NYC and Boston area driving and 26 to 27 for the life of the car (it ran on the highway a far greater percentage of the time than did the 328i). As a side note, per the OBC, the 530i was still delivering over 20 mpg at 125 mph while I was in Germany. ;-)

    Best Regards,
    Shipo
  • circlewcirclew Posts: 8,353
    OK, here's the question of the day...how/why can they keep the weight down on the 5 and let the weight gain on the 3?

    Shipo, that's really good mileage. I assume you also did spirited driving over the life of both cars. Very impressive numbers, IMO.

    Regards,
    OW
  • shiposhipo Posts: 9,152
    The 5er is kept relatively light because it was endowed with a lighter (and more expensive) aluminum front end and extensive use of aluminum elsewhere.

    As for the mileage I got on my BMWs, yeah, I they did pretty well for me. There was plenty of spirited driving done over the life of both cars. That said, their almost astounding highway mileage always seemed to bring the average up pretty darn fast. ;-)

    Best Regards,
    Shipo
  • ordered a 335xi sedan w/manual trans, will take 6 to 8 wks to get it.went with a all wheel drive for a couple of reasons 1)love the added grip for all weather conditions 2)will be tunning the car to get around 75 lbs more torgue & 50 exta hp.read an article in european car that stated the 335i got an upgrade like the one i want by vishnu tunning it read.(we found it impossible to keep the the vishnu 335i connected to the ground,the first 3 gears were met with globs of,thick white smoke, the kind camaro boys like.)3)test drove both cars in automatics both felt great on dry roads, fast & nimble. took a skip barber driving class & find it hard to believe for an everday driver to see a difference, on a test drive, but somehow habitat1 could,wonder where he took his test drives?
  • fedlawmanfedlawman Posts: 3,118
    The 335xi does weigh 220 lbs more than the 335i.

    Some people who don't often drive in snow/ice would rather have the quicker, more nimble RWD version.

    Both are nice cars - congrats on your choice.
  • shiposhipo Posts: 9,152
    "Some people who don't often drive in snow/ice would rather have the quicker, more nimble RWD version."

    Then again, there are those of us who do often drive on show and ice that would rather have the quicker and more nimble RWD version as well. ;-)

    Best Regards,
    Shipo
  • fedlawmanfedlawman Posts: 3,118
    Most people don't go out of their way to do donuts in parking lots. There are a few exceptions though... :blush:
  • shiposhipo Posts: 9,152
    I don't want RWD so that I can blow donuts (although drifting around the cul-de-sac in front of our house with the back end hanging out slinging snow all over is a heck of a lot of fun), I want RWD because it is more nimble (winter or summer), is lighter, stops shorter, and is IMHO, the better all-around car. That said, if I lived high up in the Sierras or Rockies, I'd seriously consider an "xi". ;-)

    Best Regards,
    Shipo
  • getzgetz Posts: 24
    I have a Z4 M Coupe used specifically for donuts. The 335xi is the winter mistress however, for obvious reasons.
    -Getz
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