MPG Shocker - what are you getting???

[Opie55]

Originally Posted by K7

To those people getting better fuel economy with a 650i, what's the secret?
I know to predict ahead and be conservative with the gas pedal but

I don't think you can conclude anyone is getting better than you are. Heavy cars with big engines can have vastly different mpg based on seemingly small differences in a commute because it takes so much gas to get one moving from a stop or to slow down and speed up in traffic. You might say you have a ten mile commute in city traffic, but it involves 20 stops and lots of slowing, and you get 13 mpg. The next person also says they have a ten mile commute in city traffic, but it's only 7 stops and less traffic and they get 20 mpg. But if you followed each other around, you'd get pretty much the same mpg.

[thebmw]

Originally Posted by Opie55

I don't think you can conclude anyone is getting better than you are. Heavy cars with big engines can have vastly different mpg based on seemingly small differences in a commute because it takes so much gas to get one moving from a stop or to slow down and speed up in traffic. You might say you have a ten mile commute in city traffic, but it involves 20 stops and lots of slowing, and you get 13 mpg. The next person also says they have a ten mile commute in city traffic, but it's only 7 stops and less traffic and they get 20 mpg. But if you followed each other around, you'd get pretty much the same mpg.

Well said!

[Qsilver7]

Originally Posted by Opie55

I don't think you can conclude anyone is getting better than you are. Heavy cars with big engines can have vastly different mpg based on seemingly small differences in a commute because it takes so much gas to get one moving from a stop or to slow down and speed up in traffic. You might say you have a ten mile commute in city traffic, but it involves 20 stops and lots of slowing, and you get 13 mpg. The next person also says they have a ten mile commute in city traffic, but it's only 7 stops and less traffic and they get 20 mpg. But if you followed each other around, you'd get pretty much the same mpg.

Originally Posted by thebmw

Well said!

Ditto. I tire of these threads when there's no mention of AVG MPH because that at least gives some indication of the average speed. Those with a lower AVG MPH will also tend to have a lower MPG probably due to circumstances that create more stops/starts which may indicate more city/urban driving & traffic conditions.

When the AVG MPH goes up...the average MPH usually correlates (remember there's no cause and affects in a correlation) in that there's probably less stop-n-go driving and probably indicates more highway speeds or at least travel on roads/parkways/boulevards/etc that probably have timed lights and minimum stopping.

If you're getting 20 MPH in a 650...then P L E A S E reveal what your average speed (avg MPH) is over the same period of time that you've been calculating your AVG MPG.

[Yanirgvir]

Originally Posted by K7

To those people getting better fuel economy with a 650i, what's the secret?
I know to predict ahead and be conservative with the gas pedal but

I got to the 20mpg only now that I am commuting about 40 miles each way daily. Cruising on the I-95 between Baltimore and DC. Comfort mode. Around 80-85 mph, except for some horrific traffic jams. A very relaxed daily cruise with an occasional "Pedal to the Metal" - mainly when an Audi coupe tries to play games... Don't know why, but I just can't stand Audi's...

[murph914]

Dinan s3 changed it a bit. 18 mpg when I'm averaging mostly 85 mph on the hwy in sport and DS. If I take it easy in Comfort and D around 65 - 70 it goes to around 21 22. With a turbo mated to an 8spd stomping on it really dumps fuel . . . which is why they're awesome.

[FinalRenegade]

14MPG

[BM dnobagaV]

Originally Posted by halti72

Getting 40MPG as average

I can't even fathom a world where I don't fill up every week.
40mpg =

[burkhacs]

13.2 MPG after I installed bootmod3. wasn't much better before that....

[General Lee]

Originally Posted by Flying Ace

I stopped checking my MPGs on my M6 after first week of ownership, but I'm at around 13-15 mpg on my M6 any given week.

I'm doing that too!

[Qsilver7]

Just came back from an out of town journey to attend a funeral...so I have some fresh MPG data.

As mentioned in my prior posts...average MPH plays a role in understanding the MPG. This trip was mostly traveled on federal interstate, US multi-lane limited access highways, and US two-lane roads. There was only one small town (between home & final destination) that included 3 lights and 1 other light where I had to turn off one US 2-lane road to another one. The higher MPH indicates that there was very little braking. I averaged over 23 MPG vs the 16 MPG I get normally driving around town. This was 98% of the entire trip...the othe 2% would be the city & local roads at the destination city to get to the venue of the funeral.

Gotta say the N63TU gets excellent highway MPG (in my opinion) for a 444HP engine. It's getting either the same or better MPG as my old e38 & e39 (M62 & M62tu engines respectively) that was only 282 HP and my e53 X5 with its N62 engine with 315 HP.

1st pic below is from 2/10/19 (mostly highway driving)...and the 2nd pic is from 9/16/2018 (local/city driving)

[hugo_nz]

650i and I average around 20mpg too. Happy with that though as my previous 7er and 6er were averaging around 12mpg...

[dsocold]

640i Gc 13mpg mostly around town with a bit of highway here n there

[Charka]

For my 650i gc
8.7 litres on a trip , I try to stick to 100 km/h
12-14 litres around town
I'm happy with those figures

[Greekstyle]

I'm getting 16mpg on my '15 650i Xdrive. This is with tune, CAI, M6 Mufflers, and BMS pedal tuner. Figured with mods I would have lower numbers than most due to the extra "spirited driving" i've been doing.