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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 02-14-2006, 12:59 AM   #1 (permalink)
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10% drop in gas mileage E46 - Why?

I have a 2000 323i (automatic) with 48K miles. I've always gotten 34+ mpg at my cruising speed of 72 mph. It has abruptly dropped to about 30.5 to 31 mpg. The engine runs smoothly. Anyone have the same problem? I have an extended warranty.
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Old 02-15-2006, 06:53 PM   #2 (permalink)
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Did you recently have the engine serviced? Honestly, 30 mpg is not bad. I have an 02 325i with 78k miles and I get average of 25 mpg city/freeway.

I would imagine that an abrupt drop like you mention would have something to do with computer compensation, if you are not noticing any power losses, etc. Have the codes run at your dealer if it's still under warranty.
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Old 02-15-2006, 08:13 PM   #3 (permalink)
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are you in california? it could be the gas u use....
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