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      04-09-2012, 08:45 AM   #1
bosz
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Is this MPG Possible?

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http://www.fueleconomy.gov/feg/Find....32175&id=31216

335i -- 23/33 26 Combined
328i -- 23/33 26 Combined (Same as 335i??)


But seriously, can we get some real world 335i Numbers in here? I'd really like to know how much the EPA has underestimated the 35 lol
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      04-09-2012, 09:04 AM   #2
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People are doing much better than that, but also much worse. Depends a lot on your right foot.
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      04-09-2012, 09:06 AM   #3
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We have 830 miles on the clock and I've been driving it like I stole it and averaging 22 mpg. Done a 110 miles round trip on interstate yesterday keeping the speed between 70-85mph and averaged 28mpg. I guess those numbers are achievable if you drive conservatively.

Quote:
Originally Posted by bosz View Post
http://www.fueleconomy.gov/feg/Find....32175&id=31216

335i -- 23/33 26 Combined
328i -- 23/33 26 Combined (Same as 335i??)


But seriously, can we get some real world 335i Numbers in here? I'd really like to know how much the EPA has underestimated the 35 lol
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      04-09-2012, 09:54 AM   #4
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i don't see how a 6 cyl gets the same as a 4 cyl.
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      04-09-2012, 09:58 AM   #5
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Quote:
Originally Posted by bcl0328 View Post
i don't see how a 6 cyl gets the same as a 4 cyl.
If the post above yours by a4budak is typical which I believe it is, than it can't. A 300 hp turbo 6 cylinder can't even match the N52 NA version of that engine. I average 31 mpg at 75-80 mph in mine.
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      04-09-2012, 10:01 AM   #6
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The 328 was downrated 3 mpg from what BMW claimed by the EPA. So, the 335 numbers are correct and the 328 numbers are deflated. Ppl in 328's have been getting 36 hwy pretty regularly
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      04-09-2012, 10:08 AM   #7
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Quote:
Originally Posted by Mdynamic View Post
The 328 was downrated 3 mpg from what BMW claimed by the EPA. So, the 335 numbers are correct and the 328 numbers are deflated. Ppl in 328's have been getting 36 hwy pretty regularly
I think the OP's question is whether the EPA figures for the 335 are accurate in the real world. It's doubtful that they are.
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      04-09-2012, 11:27 AM   #8
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Quote:
Originally Posted by Michael Schott View Post
I think the OP's question is whether the EPA figures for the 335 are accurate in the real world. It's doubtful that they are.
Another reason i want to get the 335 vs 328 is that it seems on paper the fuel economy of both are identical. However in real life obviosly the 35 will have lower MPG. My concern is, how much worse off is it really vs 328?

Specifically, i want to know the city MPG ppl are getting with the 335 when driving conservatively in eco pro mode? Would be nice to know the 328 city mpg in real life as well.
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      04-09-2012, 11:54 AM   #9
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Quote:
Originally Posted by bosz View Post
Another reason i want to get the 335 vs 328 is that it seems on paper the fuel economy of both are identical. However in real life obviosly the 35 will have lower MPG. My concern is, how much worse off is it really vs 328?

Specifically, i want to know the city MPG ppl are getting with the 335 when driving conservatively in eco pro mode? Would be nice to know the 328 city mpg in real life as well.
just using physics alone there is no way a larger engine will consume the same amount of fuel.
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      04-09-2012, 12:23 PM   #10
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isnt this other thread basically the same as this one?

http://www.f30post.com/forums/showthread.php?t=664939
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      04-09-2012, 12:54 PM   #11
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I'm getting above average MPG.

I have over 2200 miles on my new 328i, and I'm averaging about 34.5 mpg.

I think the owners who are getting below average MPG must be driving in Sport or Comfort mode most, if not all, of the time. The transmission gear mapping is completely different for each mode, shifting later for Sport, sooner for Comfort, and soonest for Eco Pro. So regardless of how you actually drive while in any of those modes, Eco Pro will always result in the best gas mileage.

Sport mode makes the transmission shift later, which keeps the engine's RPM at a higher speed because that's when the turbos kick in and produce the most horsepower. That's why Sport is faster.

Obviously Eco Pro is also the slowest, but after you get used to how the gas pedal works differently in each mode, you can easily get used to it.

Comfort is the normal mode, and it's a bit of a compromise between the two other modes. It doesn't shift quite as late as Sport, so it gets a little better gas mileage while sacrificing only some of Sport's peppiness.

I drive almost exclusively in Eco Pro mode. I'm coming from a standard manual transmission 2008 MINI Cooper (which I loved), so anything other than Eco Pro is wayyyy faster than I'm used to or really need. But I like the idea that pressing further on the gas pedal will result in a substantial burst of power and allow me to get around or in front of just about anything.

Don't get me wrong - I'm not a slow driver. I'm actually kinda a speed demon. But in terms of acceleration, just like in my MINI, I don't always need the car to be a rocket. As long a I know the car will comfortably travel at cruising speeds of up to 80-90mph, its enough for me.
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      04-09-2012, 03:14 PM   #12
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Quote:
Originally Posted by bcl0328 View Post
just using physics alone there is no way a larger engine will consume the same amount of fuel.
The way I see it is the 28i N20 is an overworked smaller engine which on some levels would make it consume as much gas as a larger 6 Cyl.

Now if we were talking the N20 in the 320i (which is a detuned version of the N20 in the 328i), then yes, physics alone would say the non-turbo 4 banger pushing 181 horse/184lb torque consumes way less gas than a 300 HP/300lb torque 6 Cyl in th 35. (thats a whopping 119 less hp and 116 lb less torque)

However, the 328 engine is pushing 241 horses and 258 lb torque vs 300 hp and 300 lb torque, which to me, 59 horses and 42 lb torque is not that big of a gap between the 2 engines. So how can the smaller engine not be using more fuel to produce all that power?

So thats why I'd like to know what 335i drivers are getting for city MPG in eco pro mode driving fairly conservatively.

Last edited by bosz; 04-09-2012 at 03:29 PM..
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      04-09-2012, 04:01 PM   #13
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Quote:
Originally Posted by bosz View Post
The way I see it is the 28i N20 is an overworked smaller engine which on some levels would make it consume as much gas as a larger 6 Cyl.

Now if we were talking the N20 in the 320i (which is a detuned version of the N20 in the 328i), then yes, physics alone would say the non-turbo 4 banger pushing 181 horse/184lb torque consumes way less gas than a 300 HP/300lb torque 6 Cyl in th 35. (thats a whopping 119 less hp and 116 lb less torque)

However, the 328 engine is pushing 241 horses and 258 lb torque vs 300 hp and 300 lb torque, which to me, 59 horses and 42 lb torque is not that big of a gap between the 2 engines. So how can the smaller engine not be using more fuel to produce all that power?

So thats why I'd like to know what 335i drivers are getting for city MPG in eco pro mode driving fairly conservatively.
The issue as I see it, is the BSFC (Brake Specific Fuel Consumption) map and where each engine would be running in that map, for a given driving style.

I'm sure in real world driving there will be a working range where the consumptions will be similar. Drive lighter and the smaller engine will be more fuel efficient, simply due to lower losses and greater efficiencies due to the 4-cylinder design.

It certainly will be interesting to see how each compares in ECO PRO mode of driving, but I wager the 328i will come in with better figures. Simply for the fact that the figures from the EU test regime, which is basically an ECO PRO style of test, and suggests a far better mpg from the 328i. Over 5mpg (imperial gallons) is indicated here in the UK.

HighlandPete

Last edited by HighlandPete; 04-09-2012 at 04:23 PM..
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      04-09-2012, 04:04 PM   #14
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I wonder of the numbers are in Eco Pro, or just in comfort.
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      04-09-2012, 04:28 PM   #15
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Quote:
Originally Posted by bimmerjph View Post
I wonder of the numbers are in Eco Pro, or just in comfort.
Most likely the test has to be done in the default mode. I would suggest running through this thread of the same topic http://www.f30post.com/forums/showthread.php?t=664939
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