[hyperboost]

Lately I have been getting about 20mpg with mixed city/highway driving.
Last pump up is 17.361 gallons and I drove 351 miles.

Basic info: only stay in Ecopro and comfort mode all the time, never sport mode. Stop and go traffic counts 10% of the commute. 65% commute is all high way at speed around 60-70.
No performance mods. Changed the oil twice already , currently at 12k miles.
Very easy on the pedal and I have light weight wheels and tires. 80lbs in total lighter than stock wheel/run flats.

I am not happy at all, this is far from what BMW post for mileage. It's not that I cant afford to pump gas but it's VERY annoying to not get what I am paying for. It's the same with my late 2002 Audi a4 3.0 Quattro, 20 mpg~ Apples to oranges but still what happens with fuel efficiency improvement.

It's also annoying that I couldn't buy any RWD BMWs from the lot ! To be realistic, there is only about 10 snow days a year up here!

What have you guys been getting ? 550 owners I feel your pain already lol

[kthankzbye]

I get 16-17 mixed on my 550i when being easy on the peddle. 14-15 mixed with some aggressive driving.

I don't get close to what bmw advertised, which is 17/22 mpg.

[SonicEndeavor]

That's similar to what I'm getting with my 535i rwd - about 20.5 mpg 80/20 highway/city, tracked exactly at fuelly.com for every fill-up since I bought the car. I almost never use Eco pro or ASS, and the rest is split 70/30 comfort/Sport mode. It's a big heavy car so I anticipated I'd be on the low end.

[slownfast]

Originally Posted by hyperboost

Lately I have been getting about 20mpg with mixed city/highway driving.
Last pump up is 17.361 gallons and I drove 351 miles.

Basic info: only stay in Ecopro and comfort mode all the time, never sport mode. Stop and go traffic counts 10% of the commute. 65% commute is all high way at speed around 60-70.
No performance mods. Changed the oil twice already , currently at 12k miles.
Very easy on the pedal and I have light weight wheels and tires. 80lbs in total lighter than stock wheel/run flats.

I am not happy at all, this is far from what BMW post for mileage. It's not that I cant afford to pump gas but it's VERY annoying to not get what I am paying for. It's the same with my late 2002 Audi a4 3.0 Quattro, 20 mpg~ Apples to oranges but still what happens with fuel efficiency improvement.

It's also annoying that I couldn't buy any RWD BMWs from the lot ! To be realistic, there is only about 10 snow days a year up here!

What have you guys been getting ? 550 owners I feel your pain already lol

If you are regretting about your MPG, you should more regret buying 528i drive then. honestly, it is very far from what bmw wrote. My mpg now is around 15 in the city and 30 in the highway. I never drive in sport mode, mostly comfort mode. I just installed aFe tune on my car, my MPG is getting better actually (in my opinion). there is nothing different than stock. it all depends on you how to drive the car, uphill, downhill, stop and drive, etc. there are so many hills in my city and that makes my MPG worse. my full tank is only 280 miles.

[Grover432]

17 mpg city only without allot of stop and go, but very cold weather, slippery and snow covered roads. 1,200 miles on the car.

[lovec1990]

Greetings from slovenia,

as for topic i noticed that a lot of owners turns off ASS and then talks about bad fuel economy, hyperboost did you disable ASS?

lovec

[AVIMAX]

My 2011 535xi driven 90% city averaged 17mpg during the 3 years that I had it.

[raleedy]

Three things: first, your xDrive car hauls around an extra 250 lbs of iron -- one hefty passenger's worth, and more. Second, it's winter, and the fuel formulations are high in ethanol, which has a low thermal content. Third, and most imporant: your fuel consumption correlates closely with your average speed, which the car's computer tracks. The lower your average speed, the lower your mpg. If you are not paying attention to that, you have no idea what's going on.

[The X Men]

Originally Posted by hyperboost

Lately I have been getting about 20mpg with mixed city/highway driving.
Last pump up is 17.361 gallons and I drove 351 miles.

I get about the same gas milage, about 17 MPG, 30% highway. Stop and go is what kills the gas mileage, it takes a lot of energy to move a 4400 pound car. My old Audi A6 and Lexus GS350 gets about the same gas mileage.

[raleedy]

Originally Posted by The X Men

I get about the same gas milage, about 17 MPG, 30% highway. Stop and go is what kills the gas mileage, it takes a lot of energy to move a 4400 pound car. My old Audi A6 and Lexus GS350 gets about the same gas mileage.

+1

[kube]

Originally Posted by raleedy

Three things: first, your xDrive car hauls around an extra 250 lbs of iron -- one hefty passenger's worth, and more. Second, it's winter, and the fuel formulations are high in ethanol, which has a low thermal content. Third, and most imporant: your fuel consumption correlates closely with your average speed, which the car's computer tracks. The lower your average speed, the lower your mpg. If you are not paying attention to that, you have no idea what's going on.

All good/valid points. My 2011 535iX used to average 21mpg with a mix of 60% highway, 40% local -- used cruise control most of the time on the highway at either 65mph or 75mph depending on the road, but never pampered anything.

Now on my 2nd month with a 2014 535dX, and my driving lately is flipped since November -- 40% highway and 60% local and I'm getting about 31mpg. Very happy since Diesel at the pump in my area is pretty much the same price as super, so I'm getting an extra 200 miles out of each tank!

[hyperboost]

Originally Posted by lovec1990

Greetings from slovenia,

as for topic i noticed that a lot of owners turns off ASS and then talks about bad fuel economy, hyperboost did you disable ASS?

lovec

yes i use it only after the oil temperature is up to normal temp.

[hyperboost]

Originally Posted by raleedy

Three things: first, your xDrive car hauls around an extra 250 lbs of iron -- one hefty passenger's worth, and more. Second, it's winter, and the fuel formulations are high in ethanol, which has a low thermal content. Third, and most imporant: your fuel consumption correlates closely with your average speed, which the car's computer tracks. The lower your average speed, the lower your mpg. If you are not paying attention to that, you have no idea what's going on.

really? your statement makes me look like a dumbass.

three things: first, xdrive highway mpg is 29/30(pre 2014 was 30) per bmwusa.com but i never expected that. with my light weight wheel/tire combo, i should get at least 20% BETTER fuel economy than factory but i am not. I drive by myself 70% of the time, and my GF is with me the rest. she is just a little over 100.
Second, I am aware of it is winter; all the cars use more gas. I didn't expect to be this bad.
Lastly, i pay more attention to my speed since i have HUD. late at night when there is no traffic, i drive 55-65 on the highway in ecopro mode. very light on the pedal. no uphill at all.

p.s. per the car computer, my MPG is 22.9mpg.

[hyperboost]

Originally Posted by kube

All good/valid points. My 2011 535iX used to average 21mpg with a mix of 60% highway, 40% local -- used cruise control most of the time on the highway at either 65mph or 75mph depending on the road, but never pampered anything.

Now on my 2nd month with a 2014 535dX, and my driving lately is flipped since November -- 40% highway and 60% local and I'm getting about 31mpg. Very happy since Diesel at the pump in my area is pretty much the same price as super, so I'm getting an extra 200 miles out of each tank!

how is the diesel 5er doing in the cold? I am thinking about potential diesel model as well.

Originally Posted by E.K.

If you are regretting about your MPG, you should more regret buying 528i drive then. honestly, it is very far from what bmw wrote. My mpg now is around 15 in the city and 30 in the highway. I never drive in sport mode, mostly comfort mode. I just installed aFe tune on my car, my MPG is getting better actually (in my opinion). there is nothing different than stock. it all depends on you how to drive the car, uphill, downhill, stop and drive, etc. there are so many hills in my city and that makes my MPG worse. my full tank is only 280 miles.

Wow, your car is even worse than mine. one thing to think of is that with the 528 you have to push the gas pedal down more to get the car going where 535 i can just go up to 2500rpm and it will go pretty well.

[raleedy]

Originally Posted by hyperboost

really? your statement makes me look like a dumbass.

three things: first, xdrive highway mpg is 29/30(pre 2014 was 30) per bmwusa.com but i never expected that. with my light weight wheel/tire combo, i should get at least 20% BETTER fuel economy than factory but i am not. I drive by myself 70% of the time, and my GF is with me the rest. she is just a little over 100.
Second, I am aware of it is winter; all the cars use more gas. I didn't expect to be this bad.
Lastly, i pay more attention to my speed since i have HUD. late at night when there is no traffic, i drive 55-65 on the highway in ecopro mode. very light on the pedal. no uphill at all.

p.s. per the car computer, my MPG is 22.9mpg.

Sorry if my being blunt seemed personal -- it wasn't intended that way. I'm just offering a few objective facts that affect your mileage. You're free to take them into account, or not. But I have to say two more things: first, there is no way in the world that the weight of your wheels and tires could have a 20% positive effect on your fuel economy. You're pushing a 4500-lb car around. Less than 10% of that is wheels and tires. Secondly, if you think I had something to say about your girl friend's weight, please go back and re-read.

[HighlandPete]

Originally Posted by raleedy

... Third, and most imporant: your fuel consumption correlates closely with your average speed, which the car's computer tracks. The lower your average speed, the lower your mpg. If you are not paying attention to that, you have no idea what's going on.

Totally agree, I'm also interested in the mph reading on the OBC.

Stop start and a low average speed are never going to help achieve decent mpg figures.

I'm averaging 30 mpg long term (UK gallons) in a 535i wagon, but I have very easy conditions. Change the driving to include having to keep hauling the car back up to speed and mpg soon plummets.

HighlandPete

[slownfast]

Originally Posted by hyperboost

how is the diesel 5er doing in the cold? I am thinking about potential diesel model as well.



Wow, your car is even worse than mine. one thing to think of is that with the 528 you have to push the gas pedal down more to get the car going where 535 i can just go up to 2500rpm and it will go pretty well.

You know right, I need to push the gas pedal more to accelerate. Since I installed aFe tune for N20, I do not need to push more now. It seems my car lighter than before. that is why my MPG is a little bit better.

[hyperboost]

Originally Posted by raleedy

Sorry if my being blunt seemed personal -- it wasn't intended that way. I'm just offering a few objective facts that affect your mileage. You're free to take them into account, or not. But I have to say two more things: first, there is no way in the world that the weight of your wheels and tires could have a 20% positive effect on your fuel economy. You're pushing a 4500-lb car around. Less than 10% of that is wheels and tires. Secondly, if you think I had something to say about your girl friend's weight, please go back and re-read.

rotational mass is different than static mass.
below is a actual fact


and the actual article by Car and Driver, clicky click

the main point is that the heavier your wheel/tire is, the more fuel you will use. on a this particular Golf 2.5, it shows roughly 10% better fuel economy with 14lbs per lighter wheel/tire. this car is FWD. my wheel tire is 20lbs lighter per corner and my car is AWD. maybe not 20% but i should be close up there.

My main point is the above but I mentioned about my GF weight only because she is a passenger in the car on some occasions.

[raleedy]

I think I understand about rotational mass, and the information is interesting. (I ride a bike quite a bit and I know from experience the effects of heavy tires.) But the real issue with rotational mass is inertia, which gets you back very quickly to stop-and-go, as best expressed by average speed.

[jellyfish]

2011 xdrive 535. Highway is 28 and local is about 20 mpg. I think it has decent gas mileage for such a large, heavy car. The 8 speed really helps. I take it to speed on the highway and make sure I barely push the throttle. Cruising really. Takes some concentration at first to be light on the throttle while on the highway but has become kind of unconscious now and easy. And let's just say my speed is spirited. But yeah, tough on gas mileage when driving local.

[AVIMAX]

hyperboost, you asked about the diesel… my 2014 535xd is averaging 23mpg (10.2 l/100km) so far over 6,500kms which is about 30% increase compared to my 2011 535xi which averaged 17mpg (13.7 l/100km) for mostly city driving. On the highway I can achieve 39mpg (6.0 l/100km), the best I could ever do with my 535xi was 30mpg (7.8 l/100km), but it was usually a bit lower than that more like 26mpg (9.0 l/100km) on the highway. I'm happy with the improvement in fuel efficiency and very happy with the extra 116 lb/ft of torque. Also diesel is about $0.10 cheaper than premium unleaded, not a big deal, but factor in the efficiency and the fuel cost and it is not negligible.

[The X Men]

Originally Posted by hyperboost

rotational mass is different than static mass.
the main point is that the heavier your wheel/tire is, the more fuel you will use. on a this particular Golf 2.5, it shows roughly 10% better fuel economy with 14lbs per lighter wheel/tire. this car is FWD. my wheel tire is 20lbs lighter per corner and my car is AWD. maybe not 20% but i should be close up there.

My main point is the above but I mentioned about my GF weight only because she is a passenger in the car on some occasions.

You are talking about unsprung weight vs fuel efficiency, your real life experience with lighter wheels prove that there is some flaws to those numbers.