Impressive MPG!

SpeedFreak · 07-04-2014, 10:43 AM

Took a trip early this morning to the beach, this thing does great on the highway! '11 E90 with two people and luggage. Only mods are JB4 (switched off for trip) and charge pipe. Pleasantly impressed, only had the car for a month.

ryanakata · 07-04-2014, 11:44 AM

I was impressed too with mine. I did have a bit of city driving though. (Los Angeles to West Monroe Louisiana)

wheen · 07-04-2014, 01:44 PM

I've found mine to be a little inflated. After a mostly-freeway trip, the trip meter will show me nice low 30mpg numbers, but after I actually calculate my own, it's off by 2-3 mpg.

My regular commute @ mostly city shows 22 mpg in the car, but my own calculations come to less than 18 mpg.

Jdub679 · 07-04-2014, 02:44 PM

I regularly used to see 31.9 mpg on long highway trips. This car is a highway cruiser for sure.

DesertBMW · 07-04-2014, 03:32 PM

Horrible MPG for 3.0L. There is a reason why BMW went with 2.0L with their F30

mike@x-ph.com · 07-04-2014, 05:31 PM

That is impressive mine is 15.4 mpg

Johnny Boost · 07-04-2014, 07:06 PM

OP do you have the alpina tcu or stock?

Longdoggy · 07-05-2014, 11:24 PM

Quote:

Originally Posted by wheen

I've found mine to be a little inflated. After a mostly-freeway trip, the trip meter will show me nice low 30mpg numbers, but after I actually calculate my own, it's off by 2-3 mpg.

My regular commute @ mostly city shows 22 mpg in the car, but my own calculations come to less than 18 mpg.

Maybe this can be attributed to the speedometer inaccuracy? I wonder if 50k miles is really 50k?
I may run some tests on this.

wheen · 07-05-2014, 11:40 PM

Quote:

Originally Posted by Longdoggy

Maybe this can be attributed to the speedometer inaccuracy? I wonder if 50k miles is really 50k?
I may run some tests on this.

you mean the odometer? even if that's wrong, wouldn't it be the same value the computer calculates mpg from?

Longdoggy · 07-05-2014, 11:42 PM

Quote:

Originally Posted by wheen

Quote:

Originally Posted by Longdoggy

Maybe this can be attributed to the speedometer inaccuracy? I wonder if 50k miles is really 50k?
I may run some tests on this.

you mean the odometer? even if that's wrong, wouldn't it be the same value the computer calculates mpg from?

That's true. I was thinking it all may be a little off. I've been suspicious since I learned about the speedometer.

wheen · 07-06-2014, 12:47 AM

Quote:

Originally Posted by Longdoggy

That's true. I was thinking it all may be a little off. I've been suspicious since I learned about the speedometer.

you can probably compensate with larger rolling diameter.

still, i think the odometer needs to be fairly accurate, although, you can say the same about the speedo, i suppose.

either way, my mpg reading was not off by 1-2%, so it's probably not that. it's off by waaaay more. like 22 vs 17.

CombatNinja · 07-06-2014, 07:37 AM

Hate to burst your bubble but every e90 on board computer I have ever seen is very optimistic about fuel consumption. My 2011 N55 lies to the tune of 10% pretty consistently when checked against actually calculating the consumption myself. 10% is like 2mpg over a tank for me, so that's not even close. The N55 doesn't do too badly at efficiency but it might not be as good as you think.

SpeedFreak · 07-06-2014, 09:36 AM

Quote:

Originally Posted by Johnny Boost

OP do you have the alpina tcu or stock?

Stock

Andrewe92 · 07-06-2014, 11:03 AM

I have the trans flash and fbo besides a dp.. and i usually get 25mpg mixed with highway and city.. its not bad at all although im sure the computer isnt completely on point

07-04-2014, 10:43 AM	#1
SpeedFreak Sic Semper Tyrannis 10 Rep 213 Posts Drives: '88 Porsche 951 Join Date: Oct 2011 Location: Chantilly, VA iTrader: (1)	Impressive MPG! Took a trip early this morning to the beach, this thing does great on the highway! '11 E90 with two people and luggage. Only mods are JB4 (switched off for trip) and charge pipe. Pleasantly impressed, only had the car for a month. Attached Images __________________ '88 Porsche 951 - big turbo, fuel, exhaust / '11 E90 335i MSport / '03 Estoril Blue X5 4.6is photo (87) by SpeedFreak81, on Flickr
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07-04-2014, 11:44 AM	#2
ryanakata Private First Class 8 Rep 132 Posts Drives: '11 e92 335i AT Join Date: Apr 2012 Location: West Monroe, Louisiana iTrader: (1)	I was impressed too with mine. I did have a bit of city driving though. (Los Angeles to West Monroe Louisiana)
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07-04-2014, 01:44 PM	#3
wheen Private First Class 25 Rep 163 Posts Drives: f30 Join Date: Jun 2012 Location: Bellevue iTrader: (4)	I've found mine to be a little inflated. After a mostly-freeway trip, the trip meter will show me nice low 30mpg numbers, but after I actually calculate my own, it's off by 2-3 mpg. My regular commute @ mostly city shows 22 mpg in the car, but my own calculations come to less than 18 mpg.
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07-04-2014, 02:44 PM	#4
Jdub679 Captain 89 Rep 644 Posts Drives: 2011 BMW 335i coupe M Sport Join Date: Jan 2011 Location: Irvine, CA iTrader: (1)	I regularly used to see 31.9 mpg on long highway trips. This car is a highway cruiser for sure.
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07-04-2014, 03:32 PM	#5
DesertBMW Banned 15 Rep 75 Posts Drives: 1996 328i with N55 engine Join Date: Aug 2013 Location: Phoenix AZ USA iTrader: (0)	Horrible MPG for 3.0L. There is a reason why BMW went with 2.0L with their F30
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07-04-2014, 05:31 PM	#6
mike@x-ph.com BimmerPost Supporting Vendor 28560 Rep 198,692 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	That is impressive mine is 15.4 mpg __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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07-04-2014, 07:06 PM	#7
Johnny Boost Colonel 326 Rep 2,016 Posts Drives: '21 M850i GC Join Date: May 2013 Location: TBD iTrader: (0)	OP do you have the alpina tcu or stock? __________________ WedgePerformance E40 MHD \| Performance Exhaust Mod \| BMS DP \| Vibrant 1790 \| BMS Intake \| VRSF CP \| xHP Stage 3 Michelin PSS \| M3 Control Arms LUX v4 LEDs \| Shadowline Grills \| Lip Spoiler
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07-06-2014, 07:37 AM	#12
CombatNinja Banned 51 Rep 1,556 Posts Drives: e91 328i, e90 328i, e90 335i Join Date: Feb 2011 Location: United States iTrader: (0)	Hate to burst your bubble but every e90 on board computer I have ever seen is very optimistic about fuel consumption. My 2011 N55 lies to the tune of 10% pretty consistently when checked against actually calculating the consumption myself. 10% is like 2mpg over a tank for me, so that's not even close. The N55 doesn't do too badly at efficiency but it might not be as good as you think.
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07-06-2014, 11:03 AM	#14
Andrewe92 enthusiast 123 Rep 997 Posts Drives: 2011 e92 lci 335xi Join Date: Feb 2012 Location: NJ iTrader: (0) Garage List 2011 bmw 335 xdrive [10.00]	I have the trans flash and fbo besides a dp.. and i usually get 25mpg mixed with highway and city.. its not bad at all although im sure the computer isnt completely on point
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