Poor Gas Mileage - What!?!

AP · 03-26-2023, 12:25 AM

Yes it is amazing. After my run last week where it got 37.5 mpg, I filled up yesterday and say a range of 494 miles.
( that not surprisingly dropped as I drove around yesterday)

NGT2 · 03-29-2023, 02:59 PM

Finally got around to this. Here is my fuel economy for the life of the vehicle, since I last refueled, and since I began my work week on Monday.

silverydragon72 · 03-29-2023, 04:30 PM

Quote:

Originally Posted by adhrp

Here are some numbers from my recent road trip. Trip was 90% highway. Granted these numbers are from the trip computer, but as I mentioned before, IME the real world numbers are off by only 1.5-2 mpg at most. Can't believe a V8 showing a range of 510 on a tank of gas!

Impressive my best is 440 miles of range. Now saying that I use mine for commuting all the time so its not ideal. Best I have ever got was 27mpg in eco pro on the way to work with light traffic. More often than not I'm around 21-24.6 mpg.

adhrp · 03-29-2023, 05:29 PM

Quote:

Originally Posted by silverydragon72

Impressive my best is 440 miles of range. Now saying that I use mine for commuting all the time so its not ideal. Best I have ever got was 27mpg in eco pro on the way to work with light traffic. More often than not I'm around 21-24.6 mpg.

Yeah those numbers rapidly go downhill off the highway and my range is very similar to yours for my everyday commuting. Nevertheless, for highway drives I am very impressed. In fact at one point during my road trip I couldn't believe I went from city A to city B without needing a fill up (I was fully expecting to make a pit stop); in fact, I had a comfortable amount of range left upon arrival instead of running on vapors.

BTW, Eco Pro gave me no real mpg advantage on the highway but had the disadvantage of making the response a bit sluggish, so I just kept it in Comfort all the way with a few bursts of sport in between. On the other hand, going from 55-60 mph to 70+ mph had a huge impact on efficiency.

silverydragon72 · 03-29-2023, 05:36 PM

Quote:

Originally Posted by adhrp

Yeah those numbers rapidly go downhill off the highway and my range is very similar to yours for my everyday commuting. Nevertheless, for highway drives I am very impressed. In fact at one point during my road trip I couldn't believe I went from city A to city B without needing a fill up (I was fully expecting to make a pit stop); in fact, I had a comfortable amount of range left upon arrival instead of running on vapors.

BTW, Eco Pro gave me no real mpg advantage on the highway but had the disadvantage of making the response a bit sluggish, so I just kept it in Comfort all the way with a few bursts of sport in between. On the other hand, going from 55-60 mph to 70+ mph had a huge difference on efficiency.

ECO Pro seems to help improve my commute in stop/go traffic. Not so much in normal. I swap around drive modes alot during my commute.

NGT2 · 03-29-2023, 06:38 PM

Quote:

Originally Posted by silverydragon72

Impressive my best is 440 miles of range. Now saying that I use mine for commuting all the time so its not ideal. Best I have ever got was 27mpg in eco pro on the way to work with light traffic. More often than not I'm around 21-24.6 mpg.

Elevation changes and traffic obviously make a difference. I’ll get an idea of my highway gas mileage in a couple weeks. The B58 in the 540 would get 500+ easy, even with elevation change and driving fast. I’ll be on a flat, open road on my upcoming trip but I will definitely not be driving for fuel economy

It is the first (short) road trip in the M550 after all.

adhrp · 03-29-2023, 08:14 PM

Quote:

Originally Posted by silverydragon72

ECO Pro seems to help improve my commute in stop/go traffic. Not so much in normal. I swap around drive modes alot during my commute.

Yup Eco Pro is best used in city traffic, that's where the best gains are seen IME. I sometimes switch to it in high traffic situations not for mpg reasons but to prevent constant transmission shifts with the hope that it will help prolong the life of the transmission. On the highway, Eco Pro isn't worth the trade offs.

adhrp · 03-29-2023, 08:15 PM

Quote:

Originally Posted by NGT2

I’ll be on a flat, open road on my upcoming trip but I will definitely not be driving for fuel economy

It is the first (short) road trip in the M550 after all.

Let 'er rip!

Benjamin_Nicholas · 03-29-2023, 08:28 PM

I don't understand those who buy large-engined vehicles and then mince about gas mileage.

Just drive it. Drive it hard. Enjoy it.

Eco Pro is a sin against god.

adhrp · 03-29-2023, 08:33 PM

Quote:

Originally Posted by Benjamin_Nicholas

I don't understand those who buy large-engined vehicles and then mince about gas mileage.

Just drive it. Drive it hard. Enjoy it.

Eco Pro is a sin against god.

Some of us do it for the sake of data and to marvel at the engine's capabilities...on both ends of the spectrum. Anyone can build a gas guzzling V8, what's so special about that. It's fun (at least for me) to also see how lean the machine can be.

Duta569 · 03-29-2023, 09:46 PM

Quote:

Originally Posted by Benjamin_Nicholas

I don't understand those who buy large-engined vehicles and then mince about gas mileage.

Just drive it. Drive it hard. Enjoy it.

Eco Pro is a sin against god.

My car's tuned with ethanol. When I fill up the tank it says 178 miles....for a full tank!

silverydragon72 · 03-30-2023, 09:05 AM

Quote:

Originally Posted by adhrp

Some of us do it for the sake of data and to marvel at the engine's capabilities...on both ends of the spectrum. Anyone can build a gas guzzling V8, what's so special about that. It's fun (at least for me) to also see how lean the machine can be.

Agreed I'm not concerned with gas mileage but am just impressed overall with how well it does.

adhrp · 03-30-2023, 09:45 AM

Quote:

Originally Posted by silverydragon72

Agreed I'm not concerned with gas mileage but am just impressed overall with how well it does.

I'm guessing most of us didn't walk in on a whim and buy an M550i. We went through the five stages of grief (denial, anger, bargaining, depression, acceptance) regarding the mpg numbers long before we signed the dotted line. There's always someone on mpg threads lamenting at the discussion though, and missing the point.

NGT2 · 03-30-2023, 10:36 AM

Quote:

Originally Posted by adhrp

I'm guessing most of us didn't walk in on a whim and buy an M550i. We went through the five stages of grief (denial, anger, bargaining, depression, acceptance) regarding the mpg numbers long before we signed the dotted line. There's always someone on mpg threads lamenting at the discussion though, and missing the point.

All I had was V8’s with the exception of the 15 months I was in the 540. So I’m preconditioned. To me, the 540 may as well have been a Prius hybrid as far as gas mileage. The M550 is my “normal” expectation. Haha

AP · 03-30-2023, 10:45 AM

For me, manmaths justified it
I knew the v8 would consume more fuel and as I’m not a high mileage driver (about 5000 or so miles a year) the cost of fuel ( which ain’t cheap here in the U.K.!) wasn’t a huge factor
But it’s nice to know that I’m not going to be spending all my time filling it up

So I see it as a valid item for discussion

Just shows how efficient it is and not much worse than the 540 it replaced which itself was also a very good car and engine

NGT2 · 03-30-2023, 11:24 AM

Quote:

Originally Posted by AP

Just shows how efficient it is and not much worse than the 540 it replaced which itself was also a very good car and engine

Just as a side note, to piggy back this comment - I agree on the 540 and B58 engine. I’d say the biggest compliment I can give it is that after driving the M550 for a few weeks now, I have lost zero love for the 540. I’d drive another one in a heartbeat. I would recommend it to anyone, all day long.

AP · 03-30-2023, 12:06 PM

Yeh agree
It’s really not much behind the v8
In fact on my last drive which was not particularly sporty but certainly not hanging around and with some music on quite loud , I had the thought that this could have easily have been the 540

Mandingo9 · 03-30-2023, 12:25 PM

Quote:

Originally Posted by Benjamin_Nicholas

I don't understand those who buy large-engined vehicles and then mince about gas mileage.

Just drive it. Drive it hard. Enjoy it.

Eco Pro is a sin against god.

I’d appreciate your comment but you hurt my feelings in the other thread.

Mandingo9 · 03-30-2023, 12:27 PM

Quote:

Originally Posted by Duta569

My car's tuned with ethanol. When I fill up the tank it says 178 miles....for a full tank!

Goddamn, congrats

Mandingo9 · 03-30-2023, 12:28 PM

Quote:

Originally Posted by NGT2

All I had was V8’s with the exception of the 15 months I was in the 540. So I’m preconditioned. To me, the 540 may as well have been a Prius hybrid as far as gas mileage. The M550 is my “normal” expectation. Haha

Mighty fine mpg expectations

LuvMyE92 · 03-30-2023, 12:55 PM

Quote:

Originally Posted by Mandingo9

Quote:

Originally Posted by Benjamin_Nicholas

Eco Pro is a sin against god.

I’d appreciate your comment but you hurt my feelings in the other thread.

You so sensitive!

I got 30 MPG in a recent road trip of 500-ish miles, on one tank with about 2 gallons left. I expected better, but then the car is still pretty new (2K miles) and I did romp down on it several times to, um... merge safely.

AP · 04-11-2023, 12:36 AM

Well now that my 550 is essentially run having passed 1200 miles, as an experiment I tried to see what I could get out it economy wise and managed to beat my previous best.
This time I got 39.8 mpg imperial
I saw 42mpg before coming off the motorway

This was just a bit of fun on the m25 and m40 and obviously not a typical drive but having said that it’s not that difficult to do. Constant speed is the key
I wasn’t in a rush and you can’t rush on these routes due to numerous speed cameras

Very inpressive.

03-26-2023, 12:25 AM	#111
AP Major General 2811 Rep 5,127 Posts Drives: G30 M550 Join Date: Apr 2011 Location: UK iTrader: (0)	Yes it is amazing. After my run last week where it got 37.5 mpg, I filled up yesterday and say a range of 494 miles. ( that not surprisingly dropped as I drove around yesterday)
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03-29-2023, 02:59 PM	#112
NGT2 Brigadier General 5700 Rep 4,633 Posts Drives: BMW M550i xDrive (2020) Join Date: Jan 2022 Location: West TN iTrader: (0) Garage List 2020 M550i xDrive [9.75]	Finally got around to this. Here is my fuel economy for the life of the vehicle, since I last refueled, and since I began my work week on Monday. Attached Images __________________ 2020 M550i xDrive (Champagne Quartz/Black) 2021 X7 40i M-Sport (Arctic Gray/Tartufo) RETIRED: 2018 540i Luxury Line (Dark Graphite/Canberra Beige)
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03-29-2023, 08:28 PM	#119
Benjamin_Nicholas BEAST? ... How dare you. 447 Rep 416 Posts Drives: BMW, Porsche Join Date: Dec 2019 Location: TX iTrader: (0)	I don't understand those who buy large-engined vehicles and then mince about gas mileage. Just drive it. Drive it hard. Enjoy it. Eco Pro is a sin against god. __________________ ______________ 1973 Porsche 911S 2023 BMW M550i 2023 BMW X5M 2020 BMW M340i (retired)
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03-30-2023, 10:45 AM	#125
AP Major General 2811 Rep 5,127 Posts Drives: G30 M550 Join Date: Apr 2011 Location: UK iTrader: (0)	For me, manmaths justified it I knew the v8 would consume more fuel and as I’m not a high mileage driver (about 5000 or so miles a year) the cost of fuel ( which ain’t cheap here in the U.K.!) wasn’t a huge factor But it’s nice to know that I’m not going to be spending all my time filling it up So I see it as a valid item for discussion Just shows how efficient it is and not much worse than the 540 it replaced which itself was also a very good car and engine
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03-30-2023, 12:06 PM	#127
AP Major General 2811 Rep 5,127 Posts Drives: G30 M550 Join Date: Apr 2011 Location: UK iTrader: (0)	Yeh agree It’s really not much behind the v8 In fact on my last drive which was not particularly sporty but certainly not hanging around and with some music on quite loud , I had the thought that this could have easily have been the 540
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04-11-2023, 12:36 AM	#132
AP Major General 2811 Rep 5,127 Posts Drives: G30 M550 Join Date: Apr 2011 Location: UK iTrader: (0)	Well now that my 550 is essentially run having passed 1200 miles, as an experiment I tried to see what I could get out it economy wise and managed to beat my previous best. This time I got 39.8 mpg imperial I saw 42mpg before coming off the motorway This was just a bit of fun on the m25 and m40 and obviously not a typical drive but having said that it’s not that difficult to do. Constant speed is the key I wasn’t in a rush and you can’t rush on these routes due to numerous speed cameras Very inpressive.
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