Am I getting horrible MPG even after maintenance?? B46

bryanlopez · 02-14-2021, 02:46 PM

2018 330xi sports wagon b46.
65,000/mi

I did airfilter and spark plugs along with a fuel additive about 500miles ago expecting to see my MPG go up significantly. Once after I did that I only went from 19mpg to 21mpg

I do about 80% city street driving primarily and I don’t really mash it too often but even when trying to drive lightly and even on ECO Pro I still get get any better that 21.5 mpg .

The car is near 70,000 miles and I’m thinking if it’s time for the ignition coils? I thought they had a life of about 120k

Or am I just screwed and stuck at 21MPG?

Thanks

eleven11 · 02-14-2021, 04:22 PM

Off the top of my head, I believe my F31 B46 gets around 22mpg, and I have a roof box always installed. Also, I have aftermarket wheels and suspension (fwiw). City driving is going to make it challenging to get your numbers up, but I agree that you should probably be doing a bit better.

Have you already cleaned your MAF sensor? Cheap and fast to do, and might help.

bryanlopez · 02-14-2021, 05:48 PM

Quote:

Originally Posted by eleven11

Off the top of my head, I believe my F31 B46 gets around 22mpg, and I have a roof box always installed. Also, I have aftermarket wheels and suspension (fwiw). City driving is going to make it challenging to get your numbers up, but I agree that you should probably be doing a bit better.

Have you already cleaned your MAF sensor? Cheap and fast to do, and might help.

Didn’t think about that, gonna give it a shot this evening

jaylonepa · 02-16-2021, 10:51 AM

FBO stage 2 and im usually seeing around 25ish with mixed driving. running 91 with 2-3g or so of E85 thrown in so not sure how much that is affecting mpg.

Billfitz · 02-16-2021, 10:56 AM

Quote:

Originally Posted by bryanlopez

I do about 80% city street driving primarily ... 21.5 mpg

That's normal.

bryanlopez · 02-17-2021, 04:47 PM

Quote:

Originally Posted by jaylonepa

FBO stage 2 and im usually seeing around 25ish with mixed driving. running 91 with 2-3g or so of E85 thrown in so not sure how much that is affecting mpg.

Sorry but what’s FBO?

GreenF30N26 · 02-18-2021, 07:45 AM

Quote:

Originally Posted by bryanlopez

Sorry but what’s FBO?

"Full bolt on" mods. I am getting the same mileage in town. Winter time gets me 10-20% less mileage than normal.

02-14-2021, 02:46 PM	#1
bryanlopez New Member 0 Rep 23 Posts Drives: 325 e30 mtech Join Date: Dec 2020 Location: Los Angeles iTrader: (0)	Am I getting horrible MPG even after maintenance?? B46 2018 330xi sports wagon b46. 65,000/mi I did airfilter and spark plugs along with a fuel additive about 500miles ago expecting to see my MPG go up significantly. Once after I did that I only went from 19mpg to 21mpg I do about 80% city street driving primarily and I don’t really mash it too often but even when trying to drive lightly and even on ECO Pro I still get get any better that 21.5 mpg . The car is near 70,000 miles and I’m thinking if it’s time for the ignition coils? I thought they had a life of about 120k Or am I just screwed and stuck at 21MPG? Thanks
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02-14-2021, 04:22 PM	#2
eleven11 Major 375 Rep 1,430 Posts Drives: -F85 X5M- Join Date: Mar 2007 Location: Derby City iTrader: (0)	Off the top of my head, I believe my F31 B46 gets around 22mpg, and I have a roof box always installed. Also, I have aftermarket wheels and suspension (fwiw). City driving is going to make it challenging to get your numbers up, but I agree that you should probably be doing a bit better. Have you already cleaned your MAF sensor? Cheap and fast to do, and might help. __________________ 2017 X5M - Current 2017 F31 Wagon - Current 2014 M5 ZCP - Retired 2011 135i Coupe - Retired 2007 335i Sedan - Retired
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02-16-2021, 10:51 AM	#4
jaylonepa New Member 2 Rep 15 Posts Drives: F30 330e Melbourne Red Join Date: Oct 2020 Location: Nepa iTrader: (0)	FBO stage 2 and im usually seeing around 25ish with mixed driving. running 91 with 2-3g or so of E85 thrown in so not sure how much that is affecting mpg.
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