Last post on Mar 23, 2012 at 7:31 PM
You are in the BMW 3-Series
What is this discussion about?
BMW 3 Series, Fuel Efficiency (MPG), Sedan
#41 of 93 Re: What's your real-world gas mileage? [carnaught]
Sep 04, 2007 (2:35 pm)
Which model is that?
So far the posts here where 325i/328i/330i with mpg 20 to 30 average depending on city or highway use.
I am currently pondering replacing my old battered 1997 Geo Prism with a nice 3-series BMW, but I am so used to getting 30mpg out of driving 15% city 85% highway without having to limit my desire for speed in any way (read: above 80 where traffic permits) that I wonder how much worse it would be with the stronger, newer and more expensive car... I don't want to be stuck behind hybrids just to be fuel efficient
#42 of 93 Re: New 330ci - Much Lower than expected [absolutic]
Oct 21, 2007 (8:54 pm)
I have a 328 coupe. Disappointingly it gives me 20 mpg irrespective the TLC with which I drive it. Highway driving vs city driving hardly ever seems to make a difference. I hardly ever drive during the rush hours so most of my driving is on open roads and I still end up with such a low figure. Anybody else with a 328 coupe who is getting similar figures?
Is this expected or should I take it in for an inspection?
#43 of 93 Re: New 330ci - Much Lower than expected [incognito1]
Nov 06, 2007 (7:56 pm)
That sounds low. I'm assuming you have an automatic. Do you drive in sport mode? Are you measuring the gas mileage by the computer or gallons filled at the gas station? Maybe an ecu flash is needed? Is it fully broken in? Take it into BMW and see what they say.
#44 of 93 Re: New 330ci - Much Lower than expected [incognito1]
Nov 07, 2007 (3:53 am)
I am assuming tire pressure is checked every 3 weeks and premium gasoline is your choice.
#45 of 93 On-Board Computer MPG SO LOW!!
Dec 04, 2007 (4:55 am)
Hi. I just purchased a 2000 328ci and the on-board computer is telling me I'm getting 5.9MPG. I know this isn't so just from driving it, but why would it be telling me this? Does it need to be reset? And how accurate are the on-board stats?
#46 of 93 Re: On-Board Computer MPG SO LOW!! [angecs29]
Dec 04, 2007 (8:27 am)
I know this isn't so just from driving it, but why would it be telling me this?
It could have been reset and then just driven around the dealer's lot.
Does it need to be reset?
And how accurate are the on-board stats?
The actual fuel economy is 95% of the average OBC economy.
#47 of 93 The gas gauge drops to 0 suddenly, but I really have gas!
Dec 04, 2007 (9:28 am)
Ok since I posted about 8 months on this site about my gas mileage of 15-16 mpg on my 2007 328i, my mileage improved to 19 mpg! And that is with 90% stop-and-go city LA traffic. I am very happy about it. Actually the mileage suddenly became better after about 6,000 miles.
My new problem is for the last month, my fuel gauge has been acting crazy. I would fill a tank of gas, and it would show accurate reading, and then, after about half-a-tank is gone, the gauge would just go to Zero or even less than Zero and it would indicate that I am out of gas! I ran to the gas station just to find out that I really have plenty of gas left and it is just a false reading. But it's been doing it lately. What could be the problem?
#48 of 93 Re: The gas gauge drops to 0 suddenly, but I really have gas! [absolutic]
Dec 04, 2007 (11:27 am)
What could be the problem?
The E36(1992-1999) 3 Series cars had a similar issue. In that case the problem was caused by corrosion deposits on the fuel sending unit contacts within the gas tank. BMW cured the problem by introducing a replacement unit fitted with gold contacts that do not corrode. I solved the problem on my 1995 and 1998 3ers by using only Top Tier gasolines- which contain detergent properties that prevent the deposits from occuring. That said, since your car is still under warranty I'd simply return it to the dealer. If you want to attempt an interim fix, you could try adding a bottle of Techron to your fuel; it can't hurt and it may fix the problem temporarily.
#49 of 93 My 2007 Data
Dec 27, 2007 (8:10 am)
2006 330i, non-sport.
Put on nearly 11,000 miles in 2007 and averaged 24.34mpg in a mixture of roughly 2/3 highway 1/3 city driving. Best tank (mostly highway) returned 27.31mpg. Worst tank (mostly city) returned 21.17mpg. Use sports mode frequently in city driving.
No question in my mind this car would get low 30s on a highway trip, and not just in the right lane at 55mph. I've seen what it's capable of on highway drives of 30 to 60 miles, at 70-80mph. I always have my on-board computer set to display the mpg.
Quite pleased getting this kind of gas mileage from a sports sedan. The G35 I had before it averaged about 22mpg.
#50 of 93 Re: My 2007 Data [davidd3]
Dec 27, 2007 (8:11 am)
Oh yeah, I should have mentioned that my car has an automatic transmission.