2024 540i (B58) insane 28 MPG EPA fuel economy just released

8GranCouper · 11-14-2023, 02:11 PM

Featured on BIMMERPOST.com

I believe this was just posted by the EPA. Man, I really think BMW has reached the peak of ICE tuning with the B58. These efficiency numbers are unbelievable for an engine making at least 400 HP at the crank that isn't a full hybrid.

Here it is next to G30, and just for giggles the Lexus ES 250, a naturally aspirated 4-pot.

cpt · 11-14-2023, 04:22 PM

Mild hybrid system working its magic

ppointer · 11-14-2023, 04:44 PM

Totally believable for me. Our '22 540i has averaged 27.8 mpg since new (about 7.4k miles so far).

G30 B58 · 11-14-2023, 04:46 PM

Quote:

Originally Posted by ppointer

Totally believable for me. Our '22 540i has averaged 27.8 mpg since new (about 7.4k miles so far).

Showing this to my Sport driving wife. 🤣

IAmSpeed · 11-14-2023, 04:55 PM

Yes! I have similar set up at home and can confirm this is true!

NotSharocks · 11-14-2023, 04:59 PM

My Supra does about 20 MPG.

I'd say that's a win.

SlickShift · 11-14-2023, 05:03 PM

The legend, the myth, the B58! Our heavy ass G05 X5 gets 23mpg in mixed driving. And my previous F32 440i got 27mpg in mostly highway driving (with a heavy foot). Seriously remarkable engine.

TheBingoBalls · 11-14-2023, 05:19 PM

B58 should be considered an all-time engine if not already.

drexplode · 11-14-2023, 05:24 PM

Probably better in real world conditions. At least that’s been my experience. Also, next/last gen b58 will probably squeak out a bit more with PDI.

drexplode · 11-14-2023, 05:25 PM

Quote:

Originally Posted by TheBingoBalls

B58 should be considered an all-time engine if not already.

Check wards top 10 engines for the past 8+ years ;-)

ASAP · 11-14-2023, 05:33 PM

i got 26 mpg on the hwy in my awd x3... 28 mixed for a sedan is good but nothing amazing all things considered... edpecially given today's offerings

TheMaxXHD · 11-14-2023, 05:42 PM

Quote:

Originally Posted by ASAP

i got 26 mpg on the hwy in my awd x3... 28 mixed for a sedan is good but nothing amazing all things considered... edpecially given today's offerings

The secret sauce for BMW is usually the eco pro mode (which the EPA does not test against, they test in comfort, as it is the default drive mode).

Eco pro allows you to coast efficiently, which can help at low speeds city traffic and a bit at highway as well.

In eco pro on my M340i, I can easily get into the low to mid 30s mixed. High 30s mostly highway. Even hit 41 once briefly during a highway drive. For a nearly 400HP engine with no hybrid powertrain beyond a 48v MH, that’s impressive.

White340 · 11-14-2023, 06:11 PM

I have a screenshot somewhere of my 2016 340xdrive getting 35.5 average on a 600 mile road trip with AC on. Amazing.

adhrp · 11-14-2023, 06:11 PM

B58? My N63 gives me 30 mpg on the highway when there's no traffic (actual calculation). Now that's impressive!

oz555 · 11-14-2023, 06:22 PM

Quote:

Originally Posted by SlickShift

The legend, the myth, the B58! Our heavy ass G05 X5 gets 23mpg in mixed driving. And my previous F32 440i got 27mpg in mostly highway driving (with a heavy foot). Seriously remarkable engine.

I can not understand why people admire B58 that much. It is not any better than all other modern BMW engines. For me even the B47 is better engine, not significatly of course. I can not see why ovations. By the way mine M340iX is at 19,3mpg for 35.000 miles - not bad at all.

leasehackr · 11-14-2023, 06:34 PM

I'm getting 30-31 mpg on 2021 530i.

M2siast · 11-14-2023, 07:30 PM

Quote:

Originally Posted by leasehackr

I'm getting 30-31 mpg on 2021 530i.

Oh wow that sucks…

TheBingoBalls · 11-14-2023, 07:35 PM

Quote:

Originally Posted by oz555

I can not understand why people admire B58 that much. It is not any better than all other modern BMW engines. For me even the B47 is better engine, not significatly of course. I can not see why ovations. By the way mine M340iX is at 19,3mpg for 35.000 miles - not bad at all.

It’s not just the fuel economy, it’s everything about the B58 - power output, tuneability, reliability and the actual application across multiple vehicles in different classes. There’s very little more you can ask for when it comes to the B58. The B58 is everything you think of when it comes to BMW and engine making and what you would want out of any engine.

snyder268 · 11-14-2023, 07:44 PM

Yeah B58 is such a fuel efficient motor. Just recently traded my 23 M340i Xdrive in, I consistently averaged 34-35mpg and have even touched over 36mpg on little longer trips. Can’t say the same for the 24 Xdrive S58 I traded it for 😅. But hey we all make trade offs 🤷🏼&zwj;♂️

SpaceSilverX1 · 11-14-2023, 08:31 PM

how many people buy BMWs because they are fuel efficient?

M2siast · 11-14-2023, 08:33 PM

Quote:

Originally Posted by SpaceSilverX1

how many people buy BMWs because they are fuel efficient?

Not BECAUSE they are fuel efficient, but most of us care that they are.
I wouldn’t have an M2 if had Dodge Challenger mileage.

pobrienny · 11-14-2023, 09:21 PM

My 2018 G30 plug in hybrid is averaging 49 mpg at 95k miles , so this is definitely possible with the mild hybrid technology.

11-14-2023, 02:11 PM	#1
8GranCouper Registered 21 Rep 3 Posts Drives: N/A Join Date: Nov 2023 Location: USA iTrader: (0)	2024 540i (B58) insane 28 MPG EPA fuel economy just released Featured on BIMMERPOST.com I believe this was just posted by the EPA. Man, I really think BMW has reached the peak of ICE tuning with the B58. These efficiency numbers are unbelievable for an engine making at least 400 HP at the crank that isn't a full hybrid. Here it is next to G30, and just for giggles the Lexus ES 250, a naturally aspirated 4-pot. Attached Images Last edited by 8GranCouper; 11-14-2023 at 02:18 PM..
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11-14-2023, 04:22 PM	#2
cpt Private 280 Rep 88 Posts Drives: '24 BMW i5 M60 Join Date: May 2023 Location: San Diego iTrader: (0)	Mild hybrid system working its magic
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11-14-2023, 04:44 PM	#3
ppointer Captain 643 Rep 983 Posts Drives: '01 Z3M, '12 335is, '22 540i Join Date: Jul 2013 Location: FLL iTrader: (4) Garage List 2012 BMW 335is [10.00] 2012 BMW 335i [5.25] 2008 Infiniti QX56 [0.00] 1967 Chevrolet Corv ... [10.00] 2001 M Roadster [10.00] 2022 BMW 540i [0.75] 2009 528i [9.50]	Totally believable for me. Our '22 540i has averaged 27.8 mpg since new (about 7.4k miles so far).
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11-14-2023, 04:55 PM	#5
IAmSpeed Captain 818 Rep 645 Posts Drives: 2023 X4 M40i (G02) Join Date: Jul 2022 Location: San Francisco Bay Area iTrader: (0) Garage List 2023 BMW X4 M40i [0.00]	Yes! I have similar set up at home and can confirm this is true!
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11-14-2023, 04:59 PM	#6
NotSharocks Second Lieutenant 840 Rep 265 Posts Drives: BMW M3 Join Date: May 2022 Location: Boston, MA iTrader: (0)	My Supra does about 20 MPG. I'd say that's a win. __________________ 23 A91-MT CULG, 04 M3 Carbon Black/Cinnamon 6MT, 05 M3 Interlagos Blue/Black 6MT Dinan S3-R, 00 M5 Royal Red/Extended Caramel, 00 Z3M Coupe Cosmos Black/Dark Gray/Black, 04 X5 Toledo Blue/Sand Beige 6MT
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11-14-2023, 05:03 PM	#7
SlickShift Lieutenant Colonel 322 Rep 1,802 Posts Drives: '11 BMW E90 M3 ZCP, '20 X3M Join Date: May 2007 Location: Atlanta iTrader: (6)	The legend, the myth, the B58! Our heavy ass G05 X5 gets 23mpg in mixed driving. And my previous F32 440i got 27mpg in mostly highway driving (with a heavy foot). Seriously remarkable engine. __________________ -Nick 2018 BMW 440i - M Sport, Exec Glacier Silver Metallic/Coral Red Dakota Retired: '00 323i, '06 325Ci, '09 135i, '06 Z4M Roadster, '93 525i, '76 2002, '14 X1, '14 M235i, '16 X4, '16 435i
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11-14-2023, 05:19 PM	#8
TheBingoBalls Brigadier General 3715 Rep 4,626 Posts Drives: BMW Join Date: Mar 2011 Location: Toronto, Ontario iTrader: (1) Garage List 2018 F36 BMW 440i x ... [0.00]	B58 should be considered an all-time engine if not already.
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11-14-2023, 05:24 PM	#9
drexplode Colonel 1629 Rep 2,963 Posts Drives: G20 M340i Join Date: Jul 2007 Location: Walled Lake Michigan iTrader: (17)	Probably better in real world conditions. At least that’s been my experience. Also, next/last gen b58 will probably squeak out a bit more with PDI.
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11-14-2023, 05:33 PM	#11
ASAP Major General 9528 Rep 8,344 Posts Drives: '23 X3 M40i Join Date: Sep 2012 Location: FL iTrader: (0)	i got 26 mpg on the hwy in my awd x3... 28 mixed for a sedan is good but nothing amazing all things considered... edpecially given today's offerings __________________ 2 x N54 -> 1 x N55 -> 1 x S55-> 1 x B58
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11-14-2023, 06:11 PM	#13
White340 Lieutenant Colonel 1327 Rep 1,960 Posts Drives: 2018 M3 Comp / 2022 X5 45e Join Date: Dec 2015 Location: NYC iTrader: (3)	I have a screenshot somewhere of my 2016 340xdrive getting 35.5 average on a 600 mile road trip with AC on. Amazing. __________________ 2022 X5 45e : AW/Tartufo 2018 M3 Competition : AW/SO 2016 340i xDrive : AW/CR (sold)
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11-14-2023, 06:11 PM	#14
adhrp Major 1044 Rep 1,444 Posts Drives: 2020 M550i (G30)/2021 X3 (G02) Join Date: Jun 2014 Location: FL iTrader: (0)	B58? My N63 gives me 30 mpg on the highway when there's no traffic (actual calculation). Now that's impressive! __________________ 2020 M550i (G30) \| Carbon Black Metallic/Black Nappa \| Dynamic Handling \| Driving Asst Plus \| Executive \| Luxury Seating \| Park Asst \| Ceramic Controls \| Front/Rear Heated Seats \| 20" 668M wheels 2021 X3 (G02) \| Dark Graphite Metallic/Cognac \| Premium \| Driving Asst Professional \| Front & Rear Heated Seats
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11-14-2023, 06:34 PM	#16
leasehackr Captain 266 Rep 835 Posts Drives: X5, 530e Join Date: May 2013 Location: US of A iTrader: (0)	I'm getting 30-31 mpg on 2021 530i.
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11-14-2023, 07:44 PM	#19
snyder268 Private First Class 103 Rep 113 Posts Drives: BMW 2023 M340i Join Date: Oct 2023 Location: New York iTrader: (0)	Yeah B58 is such a fuel efficient motor. Just recently traded my 23 M340i Xdrive in, I consistently averaged 34-35mpg and have even touched over 36mpg on little longer trips. Can’t say the same for the 24 Xdrive S58 I traded it for 😅. But hey we all make trade offs 🤷🏼&zwj;♂️
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11-14-2023, 08:31 PM	#20
SpaceSilverX1 slowest X1 driver ever 473 Rep 974 Posts Drives: '23 X1 M Sport, '24 530i(soon) Join Date: Apr 2023 Location: United States of America iTrader: (0)	how many people buy BMWs because they are fuel efficient?
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11-14-2023, 09:21 PM	#22
pobrienny Private 47 Rep 51 Posts Drives: BMW X3, BMW 530e Join Date: Mar 2021 Location: USA iTrader: (0)	My 2018 G30 plug in hybrid is averaging 49 mpg at 95k miles , so this is definitely possible with the mild hybrid technology.
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