New C180 dissapointing MPG?

[gIzzE]

I have a new c180 Petrol B.E. manual ( the 1.6 cgi turbo ) and really struggle to get anything above 37 mpg with very light driving on a typical day to the office.

My journey to work with light traffic is a 31 mile trip, with 50-65mph max speed, and approx 3 mile with medium traffic.

Is this normal?

I know that coming from a c220 cdi B.E was going to be different in terms of mpg, but if this is normal, then I wish I had of stuck to diesel's as I was expecting the mpg on this type of journey to be at least the early 40's. Going by the figures and what the dealer said, I was lead to believe it too.

Any comments or help is appreciated
Cheers folks

How many miles per fill up were you getting from the diesel?
How many miles per fill up are you getting from the petrol?

I ask that as the C220cdi estate my old man was lent recently was reading 52mpg, but when he filled up it seemed to not have done enough miles for over 50mpg, and calculated it was 44mpg.


Also, you using super unleaded? Up to 15% better economy and at the moment it is only costsing around 4% more at the pump.
On 95 ron it retards the timing, giving you less performance and less mpg.

 

[John]

This thread is 2 years old by the way!

 

[gIzzE]

Well spotted.

So Paulybhoy, did it get better or did you move it on?

 

[Crazyfool]

I wouldn't believe what the book says, that's near on impossible to achieve. Also do a real check. I always fill my tank to the brim, then take the mileage completed; convert it to mpg and compare it to what the computer says.

I've done this for 3 years now and the car reading is consistently 12% higher than the real reading. This is because the computer is calibrated in a.Workshop and not on real roads.

 

[Merlin1]

I have new C200 just done 1100 miles rural/urban roads short journeys using mostly Sport and Comfort mode with the stop/start disabled, just checked 32.2 MPG which while not brilliant didn't think it was too bad for a running in period.

 

[johns E350]

This thread is 2 years old by the way!

Well spotted I did not take any notice when reading from the 1st post

 

[Dieselman]

How many miles per fill up were you getting from the diesel?
How many miles per fill up are you getting from the petrol?

I ask that as the C220cdi estate my old man was lent recently was reading 52mpg, but when he filled up it seemed to not have done enough miles for over 50mpg, and calculated it was 44mpg.


Also, you using super unleaded? Up to 15% better economy and at the moment it is only costsing around 4% more at the pump.
On 95 ron it retards the timing, giving you less performance and less mpg.

When I first got this car I checked the trip reading against actual measured and was pretty pleased to find the trip computer was 0.5mpg pessimistic over the first few tanks.

 

[Satch]

I think the problem with the smaller engines such as those in the C180 is that more right foot is needed to get something approaching the sort of performance expected from such a great looking car.

Indeed so.

Smallest cars 'worse for fuel economy' - Telegraph

Thus my Land Cruiser produces consistent results......

 

[RambyUK]

I have a 2014 w204 c180 estate, driven by me for nearly 7 weeks, averaging 40mpg. This is mostly mixed town and A road driving. It's an se executive with 16" alloys and the auto climate control tends to keep the a/c on. I was expecting this and I maybe dreaming, but the car seems to have 'adjusted' to my driving style

 

[UrBusted]

Wow, my S350 does roughly 51MPG, arund 45MPG around town due to not having that much traffic. The E Class loaner does about 60.

 

[Meldrew2]

I have a 2014 w204 c180 estate, driven by me for nearly 7 weeks, averaging 40mpg. This is mostly mixed town and A road driving. It's an se executive with 16" alloys and the auto climate control tends to keep the a/c on. I was expecting this and I maybe dreaming, but the car seems to have 'adjusted' to my driving style

You're doing very well.

I've had my C180 CGI since 2009 and always been around 33 mpg except for one foggy motorway run where I never went over 50 mph.

Still, the W203 C200 returned about 29 so I am still a good 10% better off.

I don't do much mileage - less than 5K per year - so I don't really think as bout fuel costs.

Interestingly, I recently upgraded wheels from 16 inch to 18 inch and the mpg appears to be unchanged.

 

[markjay]

My C180K averages 45mpg when cruising at NSL.

In town (Central London) the mpg figures are abysmal but this depends on how long I spend idling in traffic and at he lights. I suppose that's where stop-start technology would have helped.

 

[markjay]

Also, my mileage being 5k a year, similar to Meldrew2, I don't really care much about mpg or fuel costs, in fact my interest in the car's fuel consumption is purely academic.

 

[RambyUK]

I have a 2014 w204 c180 estate, driven by me for nearly 7 weeks, averaging 40mpg. This is mostly mixed town and A road driving. It's an se executive with 16" alloys and the auto climate control tends to keep the a/c on. I was expecting this and I maybe dreaming, but the car seems to have 'adjusted' to my driving style

The car has now covered 20k miles, mpg is rising - on a run I get about 51 mpg, averaging 43 and rising... Windscreen wipers are still terrible though

 

[190]

C180K BE with manual box. Semi-rural use and rarely driven in traffic.

After 6 months of tank to tank measurements worst 40.1mpg, best 55.6 MPG and average 46.3 MPG. Displayed MPG is impressively accurate at within 1 MPG of actual figure.

To comment on the official figures;

Urban 33.6 MPG - I've never seen a figure below 39 MPG on the display but I can see it getting that bad in traffic.

Extra Urban: 56.5 MPG - On a gentle motorway run I can hit this figure easily enough but 70 MPH drops it 2-3 MPG. Can't see how it could possibly drop below 50 MPG at legal speeds.

Combined: 44.8 MPG - I don't see problem hitting this as a long term average and currently exceeding it.

Overall the official figures are achievable but if you were to use all the performance or show it a lot of steep hills the figures would plummet.