2008 335i e92 Poor Mpg

Motorsport101 · 10-09-2012, 12:12 AM

I have 2008 335i e92 100% stock, 65000 miles on it, no check engine or any lights in dash for that matter. Always filled up with chevron 91, and have done all maintenance on it. Ever since I bought it I would get 19-21 with aggressive driving. On the other hand driving like a gramma would get me an amazing 23-25 mpg. Now all of a sudden I've been getting 12.5-13.5 mpg combined. I get 205-215 Miles from a full tank of gas. Has anyone experienced this. I would expect this gas mileage with a 2008 m3 but not a 335i. Any help much appreciated before I take it in to BMW to have them take a look at it. Btw I have checked tire pressure on all tires manually (I don't trust TPMS).
Thanks

mcpcolas · 10-09-2012, 12:36 AM

wow i thought i was the only one im averaging 12.5 as well, and i dont really push my car, i dont track my car, and i only use 93 oct BP or SHELL. I took it to the dealer twice even though they were shocked, but they cant seem to find whats causing this so im getting the every is fine. there was a time when it was as bad as 9 mpg my car is still under warranty so all maintenance are up to date. hopefully ur dealer figure it out. keep me updated will you? btw i a 09 335 xi with 41,000 miles

Motorsport101 · 10-09-2012, 11:03 AM

I'm gonna wait it out 2 weeks or so. If it doesn't get any better by then I will be taken it in to have them take a look at it. I'll keep you updated. Let me know if you fix it before I do.
Thanks

bmwhitman · 10-11-2012, 03:33 PM

Check your tire pressure? Do you do a lot of city stop and go traffic ?

FastLane1011891566 · 10-11-2012, 11:50 PM

My tire pressure is right on. I have started to fill at shell, reset my computer and drive speed limit for once. Now im getting 18 mpg which is a great start. Is there such thing as bad gas? I had about two tanks that got me no more than 13 mpg. Ever since I changed from Chevron to Shell I saw a great improvement. Anyway I'll keep you guys updated.

10-09-2012, 12:12 AM	#1
Motorsport101 Registered 0 Rep 2 Posts Drives: 335i e92 Join Date: Oct 2012 Location: Long Beach CA iTrader: (0)	2008 335i e92 Poor Mpg I have 2008 335i e92 100% stock, 65000 miles on it, no check engine or any lights in dash for that matter. Always filled up with chevron 91, and have done all maintenance on it. Ever since I bought it I would get 19-21 with aggressive driving. On the other hand driving like a gramma would get me an amazing 23-25 mpg. Now all of a sudden I've been getting 12.5-13.5 mpg combined. I get 205-215 Miles from a full tank of gas. Has anyone experienced this. I would expect this gas mileage with a 2008 m3 but not a 335i. Any help much appreciated before I take it in to BMW to have them take a look at it. Btw I have checked tire pressure on all tires manually (I don't trust TPMS). Thanks
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10-09-2012, 12:36 AM	#2
mcpcolas First Lieutenant 34 Rep 361 Posts Drives: 2009 montego blue 335i xdrive Join Date: Apr 2012 Location: new jersey iTrader: (0)	wow i thought i was the only one im averaging 12.5 as well, and i dont really push my car, i dont track my car, and i only use 93 oct BP or SHELL. I took it to the dealer twice even though they were shocked, but they cant seem to find whats causing this so im getting the every is fine. there was a time when it was as bad as 9 mpg my car is still under warranty so all maintenance are up to date. hopefully ur dealer figure it out. keep me updated will you? btw i a 09 335 xi with 41,000 miles Attached Images
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10-09-2012, 11:03 AM	#3
Motorsport101 Registered 0 Rep 2 Posts Drives: 335i e92 Join Date: Oct 2012 Location: Long Beach CA iTrader: (0)	I'm gonna wait it out 2 weeks or so. If it doesn't get any better by then I will be taken it in to have them take a look at it. I'll keep you updated. Let me know if you fix it before I do. Thanks
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10-11-2012, 03:33 PM	#4
bmwhitman Private First Class 46 Rep 177 Posts Drives: E90 Join Date: Aug 2011 Location: Toronto iTrader: (0) Garage List 2006 BMW 330i (E90) [0.00]	Check your tire pressure? Do you do a lot of city stop and go traffic ?
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10-11-2012, 11:50 PM	#5
FastLane1011891566 New Member 0 Rep 13 Posts Drives: 335i Join Date: Sep 2012 Location: Los Angeles iTrader: (0)	My tire pressure is right on. I have started to fill at shell, reset my computer and drive speed limit for once. Now im getting 18 mpg which is a great start. Is there such thing as bad gas? I had about two tanks that got me no more than 13 mpg. Ever since I changed from Chevron to Shell I saw a great improvement. Anyway I'll keep you guys updated.
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