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      12-26-2017, 04:35 PM   #1
satish_141
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Question F30 320I N20 poor fuel consumption, pls help.

All,

My 2105 plate F30 320i bought 2 weeks ago only seems to do 26 MPG in town (comfort mode) and on motor way I think only 35 MPG..these figures don't look impressive, being a BMW driver I am not expecting great consumption on a petrol automatic 320i, but these still look poor to me. Is this the same experience with other F30 320i 4D Step Auto owners? just wanted to check?

Please suggest. Thanks.

Satish
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      12-27-2017, 12:14 PM   #2
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The "rated" MPG is 23/35 for city/highway. Not exactly sure what you were expecting, but what you are getting sounds about right.
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      12-27-2017, 04:07 PM   #3
satish_141
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Quote:
Originally Posted by uncleruckus View Post
The "rated" MPG is 23/35 for city/highway. Not exactly sure what you were expecting, but what you are getting sounds about right.
cool thank you


today I drove a motorway trip in eco pro mode and cruise on at 60 mph...mileage was 38 MPG and sometimes close to 40 I guess...
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      12-27-2017, 04:19 PM   #4
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As a point of comparison, the same site rates a E90 328i at 18/28 mpg, comparing to the f30 328's rated 23/35, that is about 25% increase in fuel efficiency and provides decent power bump too (especially the torque at lower rpms).

Not sure if this even matters, but in my 328i xDrive, I get 11L/100km (so about 20-21mpg) in almost 80% in the city/traffic. I am sure other 320i owners can comment on their specific, real world, numbers.
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      12-28-2017, 05:35 AM   #5
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Quote:
Originally Posted by uncleruckus View Post
As a point of comparison, the same site rates a E90 328i at 18/28 mpg, comparing to the f30 328's rated 23/35, that is about 25% increase in fuel efficiency and provides decent power bump too (especially the torque at lower rpms).

Not sure if this even matters, but in my 328i xDrive, I get 11L/100km (so about 20-21mpg) in almost 80% in the city/traffic. I am sure other 320i owners can comment on their specific, real world, numbers.
Thank you uncleruckus what you say makes sense...btw my 320i is 2015 model, how do I know if my engine is N20 or B48?
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      12-28-2017, 12:38 PM   #6
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Quote:
Originally Posted by satish_141 View Post
Thank you uncleruckus what you say makes sense...btw my 320i is 2015 model, how do I know if my engine is N20 or B48?
I don't think the North American 320i get the new b48 engines, from what I read, I think the North American 320i retains the N20/N26 engines.

Regardless, the best way to check is to run your VIN with a VIN decoder and that shoudl list the exact specs your car came with from the factory. I use a site like: https://www.bmwvin.com/ ... but any of them will work (just google "BMW VIN Decoder"). Your VIN can be found on the interior door jamb (where the tire pressure specs are) as well as in your front windshield area (visible from outside of car, looking into the front windshield, driver side).

EDIT: Realized that you may not be living in North America (silly of me to assume), so the first paragraph prob doesn't apply to you. Regardless, use a VIN decoder and you will know exactly what your car came with!
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      12-29-2017, 12:29 PM   #7
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The MPG you describe is actually quite good and I really don't know what you were expecting or what lead you to believe the n20 in the 320i would get better MPG than you are reporting. Its not a hybrid
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      01-01-2018, 04:04 PM   #8
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Quote:
Originally Posted by uncleruckus View Post
I don't think the North American 320i get the new b48 engines, from what I read, I think the North American 320i retains the N20/N26 engines.

Regardless, the best way to check is to run your VIN with a VIN decoder and that shoudl list the exact specs your car came with from the factory. I use a site like: https://www.bmwvin.com/ ... but any of them will work (just google "BMW VIN Decoder"). Your VIN can be found on the interior door jamb (where the tire pressure specs are) as well as in your front windshield area (visible from outside of car, looking into the front windshield, driver side).

EDIT: Realized that you may not be living in North America (silly of me to assume), so the first paragraph prob doesn't apply to you. Regardless, use a VIN decoder and you will know exactly what your car came with!

thank you. very good info. checked and mine is N20
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      01-01-2018, 04:06 PM   #9
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Quote:
Originally Posted by Kafkaesque328 View Post
The MPG you describe is actually quite good and I really don't know what you were expecting or what lead you to believe the n20 in the 320i would get better MPG than you are reporting. Its not a hybrid
true..you are right ..just had few doubts...all clarified and happy now::


thanks to all for responding.
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      08-12-2018, 12:52 PM   #10
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I'm having major issues myself I just purchased a pre owned 320i 2015 42xxx miles
Automatic and I'm averaging 20mpg I need help !!!
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      08-12-2018, 07:02 PM   #11
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Don't think it's a problem, honestly. I just think the engine isn't great for fuel consumption.
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      08-12-2018, 07:42 PM   #12
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Quote:
Originally Posted by ihustlexhard View Post
I'm having major issues myself I just purchased a pre owned 320i 2015 42xxx miles
Automatic and I'm averaging 20mpg I need help !!!
Well--if you do mostly highway driving, that's not good. If you do constant city stop-and-go, that's probably about right. I get 22-23 mixed suburban driving.
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      08-13-2018, 02:36 PM   #13
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To OP, do check if the engine air filter is dirty, as impeded air flow can hurt mpg.
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      08-13-2018, 05:32 PM   #14
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Quote:
Originally Posted by ihustlexhard View Post
I'm having major issues myself I just purchased a pre owned 320i 2015 42xxx miles
Automatic and I'm averaging 20mpg I need help !!!
Seems a bit thirsty, but depends on your driving style and type of driving. If you have heavy foot and drive 99% in city traffic (stop and go), then 20mpg could be reasonable (though that does seem a bit low).

I would still check air filter and spark plugs as well ... dirty filter/plugs could impact fuel economy. As well, if you literally just got the vehicle, I would drive it around normally and wait for it to "settle" (I know when I get a new vehicle, I get very excited and perhaps drive it a bit more aggressively then I would normally).
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      08-13-2018, 06:06 PM   #15
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Quote:
Originally Posted by uncleruckus View Post
Quote:
Originally Posted by ihustlexhard View Post
I'm having major issues myself I just purchased a pre owned 320i 2015 42xxx miles
Automatic and I'm averaging 20mpg I need help !!!
Seems a bit thirsty, but depends on your driving style and type of driving. If you have heavy foot and drive 99% in city traffic (stop and go), then 20mpg could be reasonable (though that does seem a bit low).

I would still check air filter and spark plugs as well ... dirty filter/plugs could impact fuel economy. As well, if you literally just got the vehicle, I would drive it around normally and wait for it to "settle" (I know when I get a new vehicle, I get very excited and perhaps drive it a bit more aggressively then I would normally).
Thank you I'll check on that
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      07-18-2019, 10:24 AM   #16
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Bumping this thread - I just got a 2016 BMW 320i with 22000 miles. Mostly highway driving and I'm only getting around 20 mpg as well, even though the trip computer is saying 27mpg. I filled up with 13 gallons and only went 260 miles. What should I do to diagnose this? Or just take it back to where I bought it and make them diagnose?
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      07-18-2019, 10:37 AM   #17
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Those are good numbers, better than what I get.

2019 is mostly highway due to commuting.
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      07-18-2019, 01:06 PM   #18
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20 mpg doesn't seem like good numbers. The majority of your numbers are 25 and up. Agree?
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      07-27-2019, 08:41 PM   #19
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Quote:
Originally Posted by Solidjake View Post
Those are good numbers, better than what I get.

2019 is mostly highway due to commuting.
Wow, those figures are low. I have a 428 and when I first got the car I was getting around 33. Put in some Redex and then V Power after a few thousand miles. I'm seeing around 39/40 even with motorway driving.
The car should be more efficient with highway driving.
Where are you reading the figures from?
If you read from the idrive the figures should be more accurate over more miles than the dash readout. Even then it's about 35 mpg.
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      07-27-2019, 08:47 PM   #20
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Quote:
Originally Posted by satish_141 View Post
All,

My 2105 plate F30 320i bought 2 weeks ago only seems to do 26 MPG in town (comfort mode) and on motor way I think only 35 MPG..these figures don't look impressive, being a BMW driver I am not expecting great consumption on a petrol automatic 320i, but these still look poor to me. Is this the same experience with other F30 320i 4D Step Auto owners? just wanted to check?

Please suggest. Thanks.

Satish
You need to look at the combined figure. Town driving will always be lower.
What does it say in the idrive for mpg?
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      07-27-2019, 08:56 PM   #21
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Quote:
Originally Posted by kingmonkey8 View Post
Wow, those figures are low. I have a 428 and when I first got the car I was getting around 33. Put in some Redex and then V Power after a few thousand miles. I'm seeing around 39/40 even with motorway driving.
The car should be more efficient with highway driving.
Where are you reading the figures from?
If you read from the idrive the figures should be more accurate over more miles than the dash readout. Even then it's about 35 mpg.
Actual miles driven and then divided by gallons put into the car to fill it up.
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      07-27-2019, 08:59 PM   #22
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Quote:
Originally Posted by Solidjake View Post
Actual miles driven and then divided by gallons put into the car to fill it up.
What does the idrive say?
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