rubbery fuel consumption figures

[Lone ranger]

Manual 125i. Consistently get 8.3l per 100

[ozzie135i]

Ok wet roads and bumpy roads give me 11.8 from a full tank of ron 98.

A full tank gone in 2 weekend days

[SparklingRed]

My 125i is very thirsty and does 13.3 of V-Power! = =

[Guran]

Originally Posted by Guran

I use petrol, 98 RON. There is no difference in fuel consumption for the various brands of 98. Anyone who tries to convince you otherwise is kidding themselves.

Here's the proof from carefully logged records of litres added, fuel brand (all 98 RON), and avg speed, from Nov 2008 to Mar 2011 in my 135i Coupe. The plot is normalised for the effect of average speed (higher average equates to lower consumption). There is no significant difference between fuel brands in terms of fuel consumption. The width of the error bars inversely reflects the number of fills of that brand eg. 32 at Shell, 13 at Caltex, 10 at BP, 3 at Mobil.


135i fuel consumption by Guran5, on Flickr

[chappy]

Originally Posted by SparklingRed

My 125i is very thirsty and does 13.3 of V-Power! = =

That is very thirsty indeed my fully tuned 335i gets 11.8 to 12.7 all of city central driving which is not bad for just on 400bhp and that's in DS mode and using the paddles all the time.

[Ethan135]

Yup I'm not surprised at all. As a 135 owner I've been getting 13-14L/100km consistently on all the major 98RON brands including BP/Votex/V-power. I've tried everything and the lowest I've ever gotten to is 12.5L/100km with nanny driving. Now I've just had my HPFP replaced under warranty and the software was updated. It's getting worse now with 15L/100km.

Anyone have any suggestions or is this quite usual for 135's running 98RON?? This is a faily even mix between highway and city driving.

[Jeef Beef]

Originally Posted by Ethan135

Yup I'm not surprised at all. As a 135 owner I've been getting 13-14L/100km consistently on all the major 98RON brands including BP/Votex/V-power. I've tried everything and the lowest I've ever gotten to is 12.5L/100km with nanny driving. Now I've just had my HPFP replaced under warranty and the software was updated. It's getting worse now with 15L/100km.

Anyone have any suggestions or is this quite usual for 135's running 98RON?? This is a faily even mix between highway and city driving.

Must be in the wrong gear all the time the max I get with a full week's worth of peak hour start/stop is close to 12. Right now with mixed highway/urban I've been on 10.6L for quite a while.

[chappy]

Originally Posted by Ethan135

Yup I'm not surprised at all. As a 135 owner I've been getting 13-14L/100km consistently on all the major 98RON brands including BP/Votex/V-power. I've tried everything and the lowest I've ever gotten to is 12.5L/100km with nanny driving. Now I've just had my HPFP replaced under warranty and the software was updated. It's getting worse now with 15L/100km.

Anyone have any suggestions or is this quite usual for 135's running 98RON?? This is a faily even mix between highway and city driving.

Wow 15L my car even without the tune has never been to that figure in the almost 3years of owning my car.
Before the tune it was getting average of 10.7 to 11.5 all the time in city driving.
Their does seem to be a lot a discrepancies as if our fuel economy is not accurate.

[dtcoff]

I've been very curious on this subject too since replacing e46 330ci 6MT with new 125i 6MT. Same general trips and more awareness of consumption (even paying some attention to the shift lights). Both generally using Caltex 95.

330ci - Mid 10s
125i - High 11s

[xrooster]

well it looks like they chew more fuel than they state. well i won't slash my wrists, mabye a class action against BMW for a fuel subsidy

[Superdaws]

Im on 10.8 AVG over 8700km mixed highway and urban driving. Nearly always on Vortex98.

[s4008616]

My N54 335i Manual is 10.4 L/100km.
I only feed it with 98 ever since it left the showroom.
Does it mean I drive like a grandma?

[RadiuM]

s4008616: yes

[tyorll]

Just slightly hijacking this thread, but whilst on the topic of fuel consumption, how large is the reserve tank? I think our fuel tank is 50L for the 135i correct? I noticed yesterday that I went below empty and was driving around with -- as my km-to-zero reading for about 15 minutes (I know, I know... but I had a voucher and like my usual petrol station and don't trust dodgy independents that were the only stations near to me when I needed to refuel). I topped up 51.5 litres at the pump. So I am guessing reserve ~8L???

Anyone have any better information?

[Hawkeye 135i]

Never been below 14.5L/100km in 19K - 90% city driving, majority of which has been short trips. I don't think I drive that aggressively - I must have a hole in the tank based on the numbers posted by others.

Just had the gearbox replaced, done 300km since all under 3000rpm (observing break-in procedures super rigidly this time), and showing 15.3L/100km. Go figure.

[Dackelone]

^^The 135i has a 55 liter tank.

I think when the low fuel light comes on you have 8 liters left. Normally I fill up before the light just comes on... and I put 45 to 48 liters in. I don't like to run the tank too low.

[TimMc]

Reserve tank? This isn't a motorbike. 53 litre tank I thought.

[banglemangle]

So as not to start yet another fuel thread, I thought I'd post some Easter consumption figures:

Took little Eastern German noddy car to Mexico over Easter and was somewhat surprised by fuel consumption:

Syd -----> Doncaster 8.5 l/100: Ave speed 102kmh (cruise control set @ 117kmh all the way on Hume - no fuel conservation techniques)

Round trip (including Yarra valley visit and return via Hothham) 8.7l/100.

Total trip roughly 2500km

[stylish.]

Update: I'm getting around 9.4L/100 kms on my 135i. It has the N55 engine, mainly driving through peak hour traffic up and down Springvale Road. Only ever used BP Ultimate =)

And yes, I do get off the line in a spirited fashion. Efficient dynamics isn't just a slogan, in my personal experiences anyway...

[recce]

I have N55 and it never go past 10.4l/100km city driving. Best i get out is 7.8 on freeway.