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01192008, 10:37 PM  #1 
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M3 mileage rating: 14/20

01192008, 10:49 PM  #2 
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Wow, that sucks! I was sure it would be more like 15/22 given that the engine is SUPPOSED to be 8% more efficient than the S54 that had a 15/22 rating. Hmmmm. Makes the efficiency of the 335i's torque monster with a tuned 400 HP seem really amazing (17/26).
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01192008, 10:51 PM  #4 
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Too bad with 400 HP, the 335 won't be getting 17/26. But you're right it is pretty bad. Even the S5 gets 16/22.

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01192008, 10:52 PM  #5 
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01192008, 10:57 PM  #7 
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I don't know the definitive answer, but it should be between those two numbers. It's just my guess.
Last edited by devo; 01192008 at 11:22 PM. 
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01192008, 11:07 PM  #8  
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Overall I'd say it gets 20% better than the M3 even with the same HP and much more torque. That is significant.
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01192008, 11:11 PM  #9  
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01192008, 11:15 PM  #10 
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01192008, 11:20 PM  #11 
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Great find ruff.
This sure is not 8% better than 16/24 for the E46 M3. Nice marketing BMW... Maybe we got shorted on BER, we must have. The highway figure should go up to at least 21 with MDCT (better gearing). I'd bet the city figure will increase as well. The gearing in lower gears will hurt efficiency but the near zero shift times will probably help more than enough to offset that. Last edited by swamp2; 01192008 at 11:36 PM. 
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01192008, 11:45 PM  #12  
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01192008, 11:47 PM  #13  
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01192008, 11:51 PM  #14 
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Very close to this number (350 WHP equates to about 400 BHP, assuming 12.5% loss).
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01202008, 12:15 AM  #15 
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Taken directly from the original link:
The new testing methods cause MPG estimates for 2008 model The 14/20 rating is a bit disappointing, but may not be too far off from most people's initial expectations. There is a link that allows a direct comparison for cars and the difference between the E46 and E90/92 M3 is fairly close. http://www.fueleconomy.gov/feg/sbs.htm E90/92 M3 mileage (city/hwy/combined): 14/20/16
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01202008, 02:03 AM  #18 
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Wow. According to the [55% city, 45% highway] rule/calculation for combined fuel economy, we get 16.7 mpg, or $3000 [at least 16.5, but less than 17.5].
(14 x .55) + (20 x .55) = 16.7 Combined fuel economy is a weighted average of the City (55 percent) and Highway (45 percent) figures. (Graphic courtesy of the EPA) 
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01202008, 02:12 AM  #19  
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01202008, 03:37 AM  #20 
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You mean, did I notice Lucid's original nearly identical question to mine had magically disappeared from the thread? Or did I miss Greg's response to the question entirely? Yes on both. Dearest apologies to all.
Relax Chai Tea. 
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01202008, 07:53 AM  #21 
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Well, looks like I can continue to brag about the occasional high MPG highway stint while the reality of my stoplighttostoplight DD will still be sucky.
Can anyone translate the new numbers into the old numbers? 
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01202008, 10:06 AM  #22  
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