w203 and fuel economy (pleased!)

[columb]

Hi!

Just wanted to say that today I've done 61.2 :bannana:miles to the gallon on 40mi route (daily work-home).

Also, my last tank lasted for 603 miles and range was still around 6 miles!!

It is W203 200 CDI
I've got some pictures if anyone interested...

Link to my route:
http://maps.google.co.uk/maps?f=d&h...0.851908,-3.685913&spn=0.449967,1.340332&z=10


and yes, I know - diesel will be more and more expensive
Looking for cheap ferry from Plymouth to buy some diesel in France

Cheers
Chris

 

[Bobby Dazzler]

Stop showing off!! 61.2mpg indeed!!??

Impressive.

I managed 30mpg on the nose today which is my highest ever, and that was on a very long, very hilly, very twisty B-road. I still don't understand how it's better than a motorway cruise but I'm not complaining!!

 

[television]

I will not take part in these threads, and that is that

 

[columb]

Sorry Guys...
I was driving 60mph so not slow
I'm not too sure what is official Mercedes figure.

Cheers
Chris

 

[KLP 92]

Sorry Guys...
I was driving 60mph so not slow
I'm not too sure what is official Mercedes figure.

Cheers
Chris

60mph and slow in the same sentence is normally about right

The most i've ever achieved from a MB Diesel is 52mpg, but then again the smallest diesel i've owned is 5cyl.

 

[KLP 92]

I'm going to burst your bubble, on my old W203 cdi, when the trip computer showed 50mpg it was only averaging 45mpg.

 

[duncanh]

Just wanted to say that today I've done 61.2 miles to the gallon on 40mi route (daily work-home).

Also, my last tank lasted for 603 miles and range was still around 6 miles!!

Unless it is different from mine, the W203 has a 62 litre tank. If you did 603 miles with 6 spare, then you would get 609 miles for 62 litres.

That is equivalent to 44.6 mpg for the tankful. Not bad for a heavy car.

I have to agree with KLP 92, the computer in the W203 is optimistic. I think mine is worse than his, nearer 15% optimistic. Mine is currently showing an average of 57 mpg over the last 17,000 miles, but occasional checks always give a true consumption in the 45-50mpg range.

I passed a petrol station today where diesel was 14p per litre more expensive than petrol. If things get any worse then the diesel advantage will be seriously diluted.

 

[verytalldave]

I have a W203 (petrol) C200K 2004/5 and last Sunday driving down to the Prestige GTG got 45.3mpg according to the cars computer. Didnt exceed 70mph at any point and usually kept to around 60mph.
I thought that was very good.

 

[columb]

This 61.2 was only for the trip.
Average for the tank was around 48mpg as far as I remember.
I will check later pics and let you know.

Cheers
Chris

Strange, I think that yesterday I've bought 62.5 litters and still had some space in tank!!
Will check receipt and reveal garage name...

 

[duncanh]

Fuel ank capacity

I think that most tanks will hold more than the stated capacity. The stated capacity includes some space for expansion. It is also possible to fill right up to almost the top of the filler pipe. In this case you will probably get another 3 - 5 litres in the tank.

I have always assumed that when the petrol pump first cuts out it has reached approximately the manufacturer's stated capacity. If I have found a cheap deal, I will often slowly squeeze in a bit more.

 

[Mike Walker]

Drove from home to Maidenhead via M25/M4 yesterday at around midday and computer said 41mpg which I thought was not bad at all. Any other views? C180 non Kompressor engine petrol here.

 

[zebmapara]

last wik i had 38.5 mpg on a 13 mile trip A13, A406, A10 around 7.30 am

 

[stevend]

My computer says 43 mpg..... tested over three tanks full got 40mpg
still not bad for a big car that doesn't hang about and better than my clk which gave 26mpg if I was careful

 

[Stratman]

Why would the on board computer be any less accurate than calculating the economy by hand? The mileage would be the same for both methods and I bet the ECU fuel metering is pretty accurate these days, more so than forecourt fuel pumps which can be up to 5% out.

 

[Wizeng]

My W203 computer economy is out by +10% I wondered if this was unusual, but reading this thread shows me it is not! Thanks chaps. My best run of 200 miles came out at 45mpg at 53MPH average, using the fill back to the brim method, but the car was showing over 50mpg.

 

[Wizeng]

Why would the on board computer be any less accurate than calculating the economy by hand? The mileage would be the same for both methods and I bet the ECU fuel metering is pretty accurate these days, more so than forecourt fuel pumps which can be up to 5% out.

Can he give me the addresses of the ones that are reading low by 5%??

 

[markjay]

Can he give me the addresses of the ones that are reading low by 5%??

Keep in mind that you are being charged for fuel by volume, not weight or mass, so if you go to the petrol station early in the morning when it is the coldest time of day you will get more fuel for your money.

 

[Wizeng]

Thanks Markjay, I know about that trick, but even with 10 deg C, It only helps by about 0.2%.

 

[jaylea]

Interesting I just changed my speedo from the bog standard C220 CDI on 2003 to a 2004 one and the new one says I get better MPG than the old speedo... go figure!

 

[Robbruce]

Well thats me well and truly miffed just filled the tank and the figures say 30mpg but thats round town driving with a couple of miles on a duel carriageway in C220 cdi on an 07 plate W203 model. By the way my computer agrees with the figures.

Rob