[Treefella]

Hi all, I've just changed from the f30 to f31 and expected the f31 sdrive to be better on fuel than the f30 xdrive. Does the extra weight of the tourer cancel out the four wheel drive. I've only done around 250 miles of city driving and the trip computer has got it at 2mpg poorer. I know I need to weight and see for a proper comparison after a fill up, but I thought it would be about 2mpg better.

Hoping some of you experienced guys might have an opinion on this. Cheers

[Pobsey]

I’ve done 1550miles in my f31 330d sdrive I’m currently at 43mpg

[Treefella]

I'm after any advice on comparing the two mpg of the cars xdrive saloon v sdrive tourer really. It's always difficult to compare general mpg as we all drive differently on different roads. Cheers

[JD6]

Originally Posted by Treefella

I'm after any advice on comparing the two mpg of the cars xdrive saloon v sdrive tourer really. It's always difficult to compare general mpg as we all drive differently on different roads. Cheers

I agree with your expectation of around 2mpg better. I would say that xDrive costs about 4mpg, and the touring shape 2mpg. So I am surprised by the actual (OBC) result.

[HighlandPete]

Originally Posted by Treefella

Hi all, I've just changed from the f30 to f31 and expected the f31 sdrive to be better on fuel than the f30 xdrive. Does the extra weight of the tourer cancel out the four wheel drive. I've only done around 250 miles of city driving and the trip computer has got it at 2mpg poorer. I know I need to weight and see for a proper comparison after a fill up, but I thought it would be about 2mpg better.

Hoping some of you experienced guys might have an opinion on this. Cheers

What is the mileage of each vehicle? OBC readings may be non comparable, due to lack of accuracy. You need brimmed figures for both, over decent mileage.

[dopper99]

Originally Posted by Treefella

... Does the extra weight of the tourer cancel out the four wheel drive..........

It would appear so, nothing in it..... a bag of shopping difference.

F30 xdrive 330d: 1690kg
F31 sdrive 330d: 1685kg

Don't forget if the F31 is new, it will take some time to get reasonable fuel consumption. In my experience ALL new engines are not as good as expected regardless of whether they are petrol or diesel. They've all improved in time.

[Treefella]

Thanks guys. Old saloon (63 plate) had 42,000 miles, new tourer (65 plate) has 24,000 miles. I'm not after exact figures just general opinion really. I just thought that the sdrive tourer may have been slightly more economical than the xdrive saloon.

[aloo6]

My sdrive F31 330d averages about 43mpg to work, that consists of 3mile urban, 35mile motorway and 10mile a-road. That's me sitting at 80/85 on the Motorway and perhaps 60ish on the a road.

Funny enough my 318d f30 was only a few mpg better.

[Rich9600]

I had a 330d sDrive saloon at the same time as another member and we had very similar mpg over our ownership period. DaveA from memory.

We both bought a 340i. However he bought another Saloon and I bought a Touring. From memory he was doing a fair bit better in terms of mpg from his Saloon vs my Touring. I think the aero of the Touring is the factor, rather than the weight. Wet weather really seems to hit my 340i's mpg. Very wet spray laden air is relatively more dense. So, amplifying the rear vortex factor?

Though, if you're doing city driving aero will be less of a factor. So, probably influenced by a tight engine, if the obc accuracy's are comparable.

[teaston]

Xdrive doesn’t affect mpg on the 3l diesels, my 335d gets same mpg as my 330d sdrive did! (Actually a little better now I’ve fitted Goodyear Assy 3’s!)

[330Stevie]

Originally Posted by teaston

Xdrive doesn’t affect mpg on the 3l diesels, my 335d gets same mpg as my 330d sdrive did! (Actually a little better now I’ve fitted Goodyear Assy 3’s!)

Holidayed last year with a friend in his 430dx drive. Driving around Cornwall to various surf beaches for a week doing exactly the same mileage/ speed in convey clicking about 600miles; we both reset trips at the start. My SDrive managed an average mpg of 44 and the XD was 39.

Great trip out as well! Without going off topic to much the XD was naturally pulling quicker out of roundabouts, but on the A30 the sd would noticeably pull stronger where speed limited allow 😜

[NISFAN]

Originally Posted by teaston

Xdrive doesn’t affect mpg on the 3l diesels, my 335d gets same mpg as my 330d sdrive did! (Actually a little better now I’ve fitted Goodyear Assy 3’s!)

And you have fuel logs to back that up?

[Ti Rich]

Originally Posted by teaston

Xdrive doesn’t affect mpg on the 3l diesels, my 335d gets same mpg as my 330d sdrive did! (Actually a little better now I’ve fitted Goodyear Assy 3’s!)

Different to what i am finding.

330d s drive 43mpg
435d x drive 39 mpg

And thats actual calculated mpg. The 435d OBC claimed i was getting 44mpg but its not.

[teaston]

Originally Posted by Ti Rich

Different to what i am finding.

330d s drive 43mpg
435d x drive 39 mpg

And thats actual calculated mpg. The 435d OBC claimed i was getting 44mpg but its not.

I extensively checked the obc against fill up to fill up, always comes out 37-38mpg on both.

I do a real mixture of short, long, country and town journeys, which could be part of the reason. Maybe if you do mainly motorway journeys the 330d sdrive is more efficient.

[NISFAN]

Originally Posted by teaston

I extensively checked the obc against fill up to fill up, always comes out 37-38mpg on both.

I do a real mixture of short, long, country and town journeys, which could be part of the reason. Maybe if you do mainly motorway journeys the 330d sdrive is more efficient.

Probably that tuning box on your 330d that was in diesel chuck mode

[DaveA]

Originally Posted by Rich9600

I had a 330d sDrive saloon at the same time as another member and we had very similar mpg over our ownership period. DaveA from memory.

We both bought a 340i. However he bought another Saloon and I bought a Touring. From memory he was doing a fair bit better in terms of mpg from his Saloon vs my Touring. I think the aero of the Touring is the factor, rather than the weight. Wet weather really seems to hit my 340i's mpg. Very wet spray laden air is relatively more dense. So, amplifying the rear vortex factor?

Though, if you're doing city driving aero will be less of a factor. So, probably influenced by a tight engine, if the obc accuracy's are comparable.

Aye, twas I...

The fuelly stats for both my cars should link in the sig (if you're using the web forum)... my running is long motorway trips with a bit or urban to and fro between... on a motorway run, I am seeing 40mpg quite regularly now... I got 45mpg on a recent run when the storm blew me across the country...

[Rich9600]

Originally Posted by DaveA

Aye, twas I...

The fuelly stats for both my cars should link in the sig (if you're using the web forum)... my running is long motorway trips with a bit or urban to and fro between... on a motorway run, I am seeing 40mpg quite regularly now... I got 45mpg on a recent run when the storm blew me across the country...

Wow, that's impressive mpg! I've only ever seen 40mpg on the obc trip computer once, then only very briefly. 38 mpg is my best trip. 110 miles of A roads and motorways.

We had different usage profiles but a 0.6 mpg difference on 330d saloons. But, my 340i Touring has a 5mpg shortfall go your Saloon.

Granted, I have a little more urban driving in the mix now. Nursery run when it fits my shifts. I think my last year of 330d ownership was about 2mpg down on my long term average, less long runs. My usage became more suited to a Petrol.

So, realistically a 2-3mpg body style penalty in my estimation. As I said above, seemingly more in the wet... I'd say 5-10% penalty for a Touring.

Both cars fuelled with premium fuel, mostly with BP Ultimate.

[HighlandPete]

Originally Posted by Rich9600

Wow, that's impressive mpg! I've only ever seen 40mpg on the obc trip computer once, then only very briefly. 38 mpg is my best trip. 110 miles of A roads and motorways.

I'm sure you'll get over 40mpg in the right conditions. I've had over 38mpg from my 535i with the less efficient N55 engine, over a 90 mile trip.

Originally Posted by Rich9600

So, realistically a 2-3mpg body style penalty in my estimation. As I said above, seemingly more in the wet... I'd say 5-10% penalty for a Touring.

I'm with you on the 2 - 3 mpg penalty saloon vs. touring, this has been pretty much the user experience since the first tourings.

xDrive penalty is more complex, as the losses are not a constant, (like weight or aerodynamics). Loadings on the drivetrain are more influenced by acceleration rates and torque transfer than the much simpler sDrive transmission.

[Jeff123]

Diesels don't like short trips when cold. Mine must take the best part of 15 minutes to warm up and I can be on the motorway in 2 minutes. In towns, it takes longer still. This sounds crazy, but it can take 30 minutes to reach operating temperature if I join the town congestion and drive in it. All this really hammers the MPG.

I have had 47 MPG on a run of 240 motorway miles, driving as hard as conditions (and speed cameras) allow. Its mid 30's around town driving very steadily.

Its so difficult to compare MPG between different cars doing different runs.

Looking at BMW official MPG figures, there is a price to pay for Xdrive, and I reckon they are correct.

[DaveA]

Originally Posted by Rich9600

Wow, that's impressive mpg! I've only ever seen 40mpg on the obc trip computer once, then only very briefly. 38 mpg is my best trip. 110 miles of A roads and motorways.

We had different usage profiles but a 0.6 mpg difference on 330d saloons. But, my 340i Touring has a 5mpg shortfall go your Saloon.

Granted, I have a little more urban driving in the mix now. Nursery run when it fits my shifts. I think my last year of 330d ownership was about 2mpg down on my long term average, less long runs. My usage became more suited to a Petrol.

So, realistically a 2-3mpg body style penalty in my estimation. As I said above, seemingly more in the wet... I'd say 5-10% penalty for a Touring.

Both cars fuelled with premium fuel, mostly with BP Ultimate.

I don't bother with premium fuel... They say use 95 octane so that's what I use.. I started on premium, hands up, but did not notice any changes swapping... happy to be saving the pennies...

I think my higher average mpg (presently averaging overall 36.3 on fuelly after 14,500 miles) is probably more down to less urban and more motorway in my mix... I think the urban bits impact the petrol engines more than the diesel ones... I certainly notice it after a couple of days just doing short urban runs...