Dissapointed with fuel consumption at motorway speeds.

[gen2c4s]

Our 30d m sport delivers around 34 mpg at a steady 55-60mph but at a steady 80mph this drops to 29mpg, our old e53 at a steady 80 would deliver 32 and an overal 26mpg including round town driving.
The E70 seems to be mapped for 55mph as around town its useless and at 80 its useless. My C4s is returning the same on an urban run.
Not impressed if this doesnt get better with miles!!!!!

[Fredo]

It doesn't really get much better to be honest. I have an SD and I do have roof bars fitted (so quite a big difference in economy terms from your car) and I get probably 26-27 mpg at 60 mph.

I agree it's poor, very poor especially against BMW's claims.

[Fraser]

Originally Posted by gen2c4s

Our 30d m sport delivers around 34 mpg at a steady 55-60mph but at a steady 80mph this drops to 29mpg, our old e53 at a steady 80 would deliver 32 and an overal 26mpg including round town driving.
The E70 seems to be mapped for 55mph as around town its useless and at 80 its useless. My C4s is returning the same on an urban run.
Not impressed if this doesnt get better with miles!!!!!

How many miles on your new X?

And, are these consumption figures from the OBC or worked manually?

[gen2c4s]

Originally Posted by Fraser

How many miles on your new X?

And, are these consumption figures from the OBC or worked manually?

It has 500 miles on the clock and its from the OBC.

[Fraser]

Originally Posted by gen2c4s

It has 500 miles on the clock and its from the OBC.

The OBC figures are generally reliable but the OBC on your E53 may be a bit optimistic compared to the one on your E70. I'd also give it a bit more time than 500 miles.

[atat88]

patience my friend...

[Fredo]

Originally Posted by atat88

patience my friend...

has yours improved much ?

Mine hasn't. I've done 12,000 miles.

[Craig]

Originally Posted by Fredo

has yours improved much ?

Mine hasn't. I've done 12,000 miles.

Mine also hasn't improved over time. I have 4800 miles on mine.

Craig

[XXX555]

First refill today, 340 miles....19.2mpg all city. No doubt it will improve.

[z2g]

Unless BMW's are special and different from other new cars, MPG usually is low or sporatic during the break-in period. As the car is driven more, the MPG will stabilize and get closer to the posted fuel economy. This happens usually between the first 5k-10k miles on a new car.

So, I'm a bit surprised by this post. Or, have I misunderstood this entire thread?