Gas mileage getting progressively worse

Khurram · 09-20-2009, 01:26 PM

When I first got my car I was getting around 210-220 miles per tank.

It's an E93 M3 with 90% city driving in hot and humid Miami.

Over my last few fills i'm noticing my mileage getting lower and lower.

It went down to around 200 miles per tank. Then I was getting around 190 per tank. On my last tank I only managed 179.

I have not changed my driving style and the weather here has actually gotten a bit cooler.

I'm scheduled for my next maintenance service in October. Is there anything in specific I should tell them to check to see what the issue could be?

Poppin Fresh · 09-20-2009, 02:10 PM

Perhaps it's the price per gallon that's going up?

Khurram · 09-20-2009, 02:13 PM

Quote:

Originally Posted by Poppin Fresh

Perhaps it's the price per gallon that's going up?

I'm talking about a full tank of gas. I fill up to full every time.

Yervais · 09-20-2009, 02:27 PM

Our stock air-boxes are extremely good at flowing air in... so much that sometimes your filter could get clogged in with debris... so thats why you might be experiencing a decrease in your range...

Either open you airbox to see whats up or try this... buy an aftermarket air filter I got the ape performance one... I know this will sound crazy but they improve the car quite a lot for city driving due to better throttle response and milage goes up... with the stock filter I used to get 240 miles on one tank on shell now with the ape air filter I got 270-290 and very nice throttle response...

So give it a try... this is on a 2009 E92

Khurram · 09-20-2009, 02:31 PM

Hmm..that could be it. That sounds like a significant performance increase.

ScheerSpeed · 09-20-2009, 02:33 PM

wow... thats not good at all man... i get about 270-290 but i drive 95% highway

Khurram · 09-20-2009, 02:40 PM

I know Dom!
I don't even drive hard...I go over 7k rpm probably once a day and that is only when i'm getting onto 395.

Perhaps my air filter is really blocked up. I'll check it out. Any other ideas?

Big Windy · 09-20-2009, 02:41 PM

Quote:

Originally Posted by ScheerSpeed

wow... thats not good at all man... i get about 270-290 but i drive 95% highway

wow, thats great...i get less than 200. almost all city driving.

@the OP, the performance of your engine is going to change over time...so this is probably totally normal. also, are you calculating your miles per tank based on your trip-meter and the gas receipt? or are you going by what the computer tells you the range is?

Khurram · 09-20-2009, 02:42 PM

I'm calculating by resetting the trip odometer when I fill up and then going by what it says by the time I fill up next.

Quote:

Originally Posted by Big Windy

wow, thats great...i get less than 200. almost all city driving.

@the OP, the performance of your engine is going to change over time...so this is probably totally normal. also, are you calculating your miles per tank based on your trip-meter and the gas receipt? or are you going by what the computer tells you the range is?

Khurram · 09-20-2009, 02:43 PM

btw..my car is at 6100 miles.

Yervais · 09-20-2009, 03:08 PM

btw I drive 50/50 city-hwy

Big Windy · 09-20-2009, 04:01 PM

Quote:

Originally Posted by Khurram

I'm calculating by resetting the trip odometer when I fill up and then going by what it says by the time I fill up next.

how do you know when to fill up? or are you dividing the number of gallons you pump into the number of miles on the tripmeter?

Khurram · 09-20-2009, 04:06 PM

Yes that's how i'm calculating it

ooowowizstev · 09-20-2009, 04:07 PM

I really need to get myself an aftermarket air filter now lol.

MTROIS · 09-20-2009, 04:11 PM

I average ~17 MPG so usually I manage to get ~ 250 miles per tank with 75% HWY.

Aldo19 · 09-20-2009, 04:13 PM

Is there a BMW M Club in the Miami/Ft. Lauderdale area?

J08M3 · 09-20-2009, 04:27 PM

you'd be surprised what a couple of really short drives around town can do to lower your MPG. Do an extra one of those and even just slightly less on the highway or longer cruising drives and you can easily see a drop in MPG

MrHarris · 09-20-2009, 04:39 PM

I get 240-270

nusevad · 09-20-2009, 07:51 PM

mine has been getting better...

got over 23 by a little bit, average speed says 75, but i was hitting 100+ on open stretch of highway.

RRGOO7 · 09-20-2009, 10:21 PM

its just the different routes you take. some times you are sitting in traffic more than others. I get about the same as you. Around 200 per tank.

spyderco10 · 09-21-2009, 04:04 AM

I've never gotten more than 200 miles a tank. in fact i've never even gotten 200 miles a tank. i usually get gas every 150 miles, with a 1/4 tank left. i probably drive 50/50 city/highway. if you do any type of city driving, mileage on this car is horrible. like another poster said, even just a few short trips in the city, will greatly reduce your mpg

JJM335 · 09-21-2009, 07:48 AM

Quote:

Originally Posted by J08M3

you'd be surprised what a couple of really short drives around town can do to lower your MPG. Do an extra one of those and even just slightly less on the highway or longer cruising drives and you can easily see a drop in MPG

+1

I have seen my avg. mpg go down to 16 from 18 - 19 since I stopped using my car as a daily driver (fewer long hwy trips).

09-20-2009, 01:26 PM	#1
Khurram Lieutenant 49 Rep 409 Posts Drives: 2012 Panamera 4 Join Date: Jan 2009 Location: Stamford, Connecticut iTrader: (0)	Gas mileage getting progressively worse When I first got my car I was getting around 210-220 miles per tank. It's an E93 M3 with 90% city driving in hot and humid Miami. Over my last few fills i'm noticing my mileage getting lower and lower. It went down to around 200 miles per tank. Then I was getting around 190 per tank. On my last tank I only managed 179. I have not changed my driving style and the weather here has actually gotten a bit cooler. I'm scheduled for my next maintenance service in October. Is there anything in specific I should tell them to check to see what the issue could be?
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09-20-2009, 02:10 PM	#2
Poppin Fresh Colonel 85 Rep 2,148 Posts Drives: With a sunroof and front plate Join Date: May 2009 Location: Bergen County NJ iTrader: (0)	Perhaps it's the price per gallon that's going up? __________________
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09-20-2009, 02:27 PM	#4
Yervais Enlisted Member 3 Rep 36 Posts Drives: SSII M3 Join Date: Aug 2009 Location: Texas iTrader: (0)	Our stock air-boxes are extremely good at flowing air in... so much that sometimes your filter could get clogged in with debris... so thats why you might be experiencing a decrease in your range... Either open you airbox to see whats up or try this... buy an aftermarket air filter I got the ape performance one... I know this will sound crazy but they improve the car quite a lot for city driving due to better throttle response and milage goes up... with the stock filter I used to get 240 miles on one tank on shell now with the ape air filter I got 270-290 and very nice throttle response... So give it a try... this is on a 2009 E92
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09-20-2009, 02:31 PM	#5
Khurram Lieutenant 49 Rep 409 Posts Drives: 2012 Panamera 4 Join Date: Jan 2009 Location: Stamford, Connecticut iTrader: (0)	Hmm..that could be it. That sounds like a significant performance increase.
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09-20-2009, 02:33 PM	#6
ScheerSpeed Major General 414 Rep 5,768 Posts Drives: '13 F30 Estoril M-Sport 335i Join Date: Sep 2006 Location: Miami, FL iTrader: (14)	wow... thats not good at all man... i get about 270-290 but i drive 95% highway
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09-20-2009, 02:40 PM	#7
Khurram Lieutenant 49 Rep 409 Posts Drives: 2012 Panamera 4 Join Date: Jan 2009 Location: Stamford, Connecticut iTrader: (0)	I know Dom! I don't even drive hard...I go over 7k rpm probably once a day and that is only when i'm getting onto 395. Perhaps my air filter is really blocked up. I'll check it out. Any other ideas?
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09-20-2009, 02:43 PM	#10
Khurram Lieutenant 49 Rep 409 Posts Drives: 2012 Panamera 4 Join Date: Jan 2009 Location: Stamford, Connecticut iTrader: (0)	btw..my car is at 6100 miles.
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09-20-2009, 03:08 PM	#11
Yervais Enlisted Member 3 Rep 36 Posts Drives: SSII M3 Join Date: Aug 2009 Location: Texas iTrader: (0)	btw I drive 50/50 city-hwy
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09-20-2009, 04:06 PM	#13
Khurram Lieutenant 49 Rep 409 Posts Drives: 2012 Panamera 4 Join Date: Jan 2009 Location: Stamford, Connecticut iTrader: (0)	Yes that's how i'm calculating it
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09-20-2009, 04:07 PM	#14
ooowowizstev Brigadier General 141 Rep 4,903 Posts Drives: '08 E92 M3 Join Date: Jul 2008 Location: Los Angeles, Irvine iTrader: (4) Garage List 2008 BMW E92 M3 [10.00]	I really need to get myself an aftermarket air filter now lol. __________________ '08 E92 ///M3 - AW/BLK/CF, M-DCT, 19's H&R, Vorsteiner, Eisenmann, BMC, BBS More to come...
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09-20-2009, 04:11 PM	#15
MTROIS Major 188 Rep 1,153 Posts Drives: on the wrong side of the Ocean Join Date: Jul 2008 Location: New Jersey, USA iTrader: (0)	I average ~17 MPG so usually I manage to get ~ 250 miles per tank with 75% HWY. __________________ 2019 M2C MT (ED + PCD) \| 2008 M3 Coupé MT \| 1995 M3 LTW MT \| BMW CCA HPDE Instructor
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09-20-2009, 04:13 PM	#16
Aldo19 Registered 0 Rep 2 Posts Drives: 2009 M3 Join Date: Sep 2009 Location: South Florida iTrader: (0)	BMW M Club Is there a BMW M Club in the Miami/Ft. Lauderdale area?
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09-20-2009, 04:27 PM	#17
J08M3 Major General 285 Rep 6,007 Posts Drives: 2011 M3 COUPE Join Date: May 2008 Location: NEW YORK iTrader: (8)	you'd be surprised what a couple of really short drives around town can do to lower your MPG. Do an extra one of those and even just slightly less on the highway or longer cruising drives and you can easily see a drop in MPG __________________
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09-20-2009, 04:39 PM	#18
MrHarris yodog 197 Rep 5,026 Posts Drives: '86 Corolla Join Date: Jun 2007 Location: Diamond Bar, Ca iTrader: (5) Garage List 2009 BMW [10.00]	I get 240-270 __________________ 2009 E92 M3 \| Alpine White \| Black Extended \| Advan RS \| Turner Test Pipes \| Dinan Axle-Back \| OETuning \| Eibach Springs \| UUC SSK \| VRS Front Lip \| VRS Type I Diffuser \| Matte Black \| RPi Scoops \| MS Filter \| Yokohama AD08 \| F1 Pinnacle Special Thanks: Gintani \| OETuning \| eAs
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09-20-2009, 07:51 PM	#19
nusevad O! So Sour!! 552 Rep 15,615 Posts Drives: Fast 240z / Slow M3 Join Date: Apr 2007 Location: 'Merica! iTrader: (24) Garage List 1971 Datsun 240z [0.00] 2008 M3 [9.60]	mine has been getting better... got over 23 by a little bit, average speed says 75, but i was hitting 100+ on open stretch of highway. __________________
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09-20-2009, 10:21 PM	#20
RRGOO7 Colonel 360 Rep 2,451 Posts Drives: GTR Join Date: Dec 2006 Location: Miami FL iTrader: (13)	its just the different routes you take. some times you are sitting in traffic more than others. I get about the same as you. Around 200 per tank.
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09-21-2009, 04:04 AM	#21
spyderco10 Colonel 63 Rep 2,427 Posts Drives: AW E92 M3 6MT Join Date: Jul 2008 Location: Honolulu, HI iTrader: (0)	I've never gotten more than 200 miles a tank. in fact i've never even gotten 200 miles a tank. i usually get gas every 150 miles, with a 1/4 tank left. i probably drive 50/50 city/highway. if you do any type of city driving, mileage on this car is horrible. like another poster said, even just a few short trips in the city, will greatly reduce your mpg __________________ “For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.” - John 3:16
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