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2Addicts | BMW 2-Series forum Technical Topics N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning Brand new car mpg?

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      06-23-2017, 12:33 PM   #1
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Brand new car mpg?

I got my 230i xDrive(B46) a week ago.
But...only got 18.8mpg on trip computer...(mostly city)
Is this usual on brand new car?
Do you guys think mpg will be better?
Any experience?
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      06-24-2017, 10:21 AM   #2
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Yes, that's about right. Mostly city will be lower MPG until the car gets fully broken in, usually after about 7500 miles. My 228i convertible with 8 AT wouldn't get over 27 MPG on the highway until we got closer to 10K, and now it gets 34.
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      06-24-2017, 03:42 PM   #3
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Quote:
Originally Posted by roundel335 View Post
Yes, that's about right. Mostly city will be lower MPG until the car gets fully broken in, usually after about 7500 miles. My 228i convertible with 8 AT wouldn't get over 27 MPG on the highway until we got closer to 10K, and now it gets 34.
Thanks for letting me know.
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      07-04-2017, 05:20 PM   #4
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Mine has 1300 miles on it. (230i)
I have been getting mid to upper 20s in around town/suburbia driving and low 30s on the highway. I could do better if I drove more conservatively.
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      07-10-2017, 03:14 PM   #5
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My highway mpg has actually been the best right after I got the car. I have a manual and I got 34 mpg with cruise on 74. Now I get 31-32 at same speed
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      07-10-2017, 10:57 PM   #6
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Originally Posted by adema24 View Post
My highway mpg has actually been the best right after I got the car. I have a manual and I got 34 mpg with cruise on 74. Now I get 31-32 at same speed
Have you tried different octane gas? I seem to get better mpg with 89 octane versus 93 octane.

I'm on my 3rd tank of 89, so I'm guessing it's gotta be 89 or 90 octane.. My normal highway commute is up 33 or 34 mpg with it. On 93, I was getting 29 or 30 mpg.

I don't know why I get better mpg on 89, but I'm guessing it's because it takes less spark to ignite it... Maybe that's giving me a better burn? No idea, but the mpg is better than with 93 and it costs less.

Once I'm down to empty, I'm going to go back to 93 to see if it might just be my driving.. I don't know.. but right now, it seems 89 might be the ticket for me since I'm not racing my car.
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      04-19-2018, 11:47 PM   #7
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Just bought a 2015 F23 with 28k abx I'm seeing 16 to 16.5 city, is that bad?
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      04-20-2018, 10:59 PM   #8
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If you drive the 230i hard at all you won't do much better than 20. I average about 22-24 in mixed driving. On long road trips I can get up to 32-35 depending on speeds and grades. If you're going to thrash it...you might as well go with the big engine as the economy loss isn't that great. Weakest link in the F22 is the tiny fuel tank.
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      04-22-2018, 02:58 PM   #9
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This really worries me. With my 2015 335xi I average 23.1 right now in 70% City / 30% Highway driving. With the JB+ and my AFE Pro Dry filter I was averaging closer to 25 MPG average but took them off for a service and never put them back on as my lease is ending soon.

I have a 2018 230xi on order, being a lighter, newer car, with a smaller engine I thought I'd be getting better MPG? It certainly is rated better.
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      04-22-2018, 03:41 PM   #10
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Quote:
Originally Posted by Tyresian View Post
This really worries me. With my 2015 335xi I average 23.1 right now in 70% City / 30% Highway driving. With the JB+ and my AFE Pro Dry filter I was averaging closer to 25 MPG average but took them off for a service and never put them back on as my lease is ending soon.

I have a 2018 230xi on order, being a lighter, newer car, with a smaller engine I thought I'd be getting better MPG? It certainly is rated better.
yes...if you're light-footed it will be better. if you thrash it, it will be worse is my experience, as the little engine has to work much harder than the large one.
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      04-22-2018, 03:45 PM   #11
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Quote:
Originally Posted by E46M54325Ci View Post
yes...if you're light-footed it will be better. if you thrash it, it will be worse is my experience, as the little engine has to work much harder than the large one.
Yeah I suppose I really won't know how it is for me until I drive it long term, and city driving can mean very different things between different cities, my driving is probably more "town" driving than city driving.
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      05-21-2018, 09:53 AM   #12
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Driving style makes a HUGE difference. Pure highway I can get up into the 30's, and when I remember to put it on eco mode it adds about 5% more (when going steady on cruse control, you don't notice it is in eco, but I never remember this). Next favorite mode seems to be 'spirited country roads' where I can usually do mid-high 20's, even averaging in the 40-50mpg. City driving will be lucky to be up into 18-19mpg.

I can't see the logic of running 89 octane just for mileage, since that also basically neuters the power, and brings potential mechanical risk - not worth it to save a few $$ IMHO (but miles of thread on that topic, pro and con....).
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      05-21-2018, 02:18 PM   #13
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Ha - my stage 2 235 xdrive my v8 X5 get about the same MPG.
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      05-22-2018, 03:23 AM   #14
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Once the engine gets broke in it should get better, but probably not a lot.

Make sure you are getting good gas.
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      06-23-2018, 05:50 PM   #15
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2017 230i with 24,000 miles

Road trip at a steady 80 mph I get in the low 40's

Daily Driver, 60% highway, high 20's
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      07-04-2018, 12:01 PM   #16
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2018 230xi with 8,500 miles. I'm averaging 25.1 MPG, mixed driving. If I drive like a grandma in Eco Pro mode, around town, I can get high 20s. The performance hit is really staggering in Eco Pro, almost un-driveable.
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