How much does your 220 cdi consumes?

[Pzd]

I would like to hear from you how much l of diesel does your 220 cdi consumes, since mine spends arround 8 l/100 km. Is it normal?

Thanks

PZD

 

[Unleashed]

For the Imperials users, that's about 32-35 miles per gallon.

 

[pittallen]

I am currently averging around 45 - 48mpg, with many trips up and down motorways at around 53-55mpg, even managed to hit 59.7mpg (have mobile snap as proof )

Mine is 03 Plate C220CDI Avantgarde SE

 

[jberks]

It totally depends on where and how you drive. My E270CDI will do 51mpg, but only on the flat at 55mph. Going to work, I commonly get 41mpg but this week with less traffic, my motorway speed has increased from a steady trundle at 50-60mph to a cruise at 80-85 - and hey presto - mpg down to 38. In town I can see 28-31 or less if I let the turbo have its way. Hence, comparisons can be fairly meaningless without a detailed context.

 

[Frank Patten]

My W210 220cdi does both town and motorway work and I am getting 42 to 44 mpg. My wife does most of the motorway stuff on the M25 at about 80mph (or more if she thinks she can get away with it! So far she hasn't been caught by the speed cameras near Heathrow. it seems to me to be a superb engine.

 

[Pzd]

Errr... I must do some calculation to convert your values.

Just a minute!

 

[Pzd]

Well, by my calculations, the minumum that I achieved was arround 40 and the maximum was about 35 I think that it is too much.
What is the influence of the cold weather and the air and fuel filter?

 

[jberks]

A clogged air filter can certainly increase fuel consumption. Has the car been regularly serviced?
Weather can have an effect but not that dramatic - maybe a couple of mpg but no more. Infact the colder the air, the denser the mixture and the more efficient the engine should be.
Firstly - which 220 - C,E,
How old is it ?
Whats the mileage ?
What were the road conditions when you recorded these figures? Town, motorway, traffic, mixed?

There were problems, around 03 ish I believe, with CDIs (220 and 320) recording poor fuel consumption. This was when they introduced the particle filters and it took a while for them to get the engine management setup right. They increased the fueling to counter the drag of the filter on the exhaust system but this caused the mpg to fall dramatically. The 270 wasn't affected as they didn't put a filter on it. Clearly they got it right in the end as current 220s are fine. It may be a software fix I'm not sure.

 

[Pzd]

Hi!

After I changed de air filter, the consumption was 38 (3 mpg less) with a bit of town and the most of it in motorway with average speed of 81 mph. The car is a C 202 with 125 bhp and 93t miles. The filters were changed last service, 9000 miles ago. Today I'm going to change the fuel filter to see if there is any difference. This is the first Merc, I knew that it would consume more than an Tdi (VAG) but my average is the sames as a Tdi maximum! I know also that a Tdi wouldn't get to 300t miles with health but...
One last thing, I have at the back 225/50R16 and 205/55R16 at the front and auto gbox, could this mean significant raise of consumption?

Thanks

PZD

 

[jberks]

Looking at the 'official' mpg figures for your car and mine, yours is 30/53/42 and mine is 28/53/41 so not much difference. This morning I got 37.5. I had the cruise set to 80 and virtually no traffic to fight through when I hit the town bits. Normally, I am in heavy traffic, so motorway speeds are 40-60 with occasional blasts to 90+ when there is a big enough clearing. I don't use the cruise and then stop-start etc through the towns. After all that, most mornings I get 41!. I doubt it's they tyres. I have 245's all round and regularly drive in heavy rain. It possibly knocks 1mpg off but thats all.

So, fixed 80, on cruise control appears to be bad
60-90 but possibly more gentle on the throttle and slower up hill due to traffic seems to be good

You quote a very specific average of 81. I presume that's off the computer. In my experience, to average 81 you need to be doing 100 at times. That means quite a bit of acceleration, slowing (brakes?) and acceleration again, plus anything over 70 and you'll get an exponential reduction in economy as I've found above.

38-40 whilst certainly not brilliant, sounds realistic given the circumstances, but if you want better, I'd drop the speed to 75 and try to be as gentle as possible, letting the car coast down rather than braking - That small change in style made a dramatic effect on my E240. You should see 45. You won't see 50+ unless you are happy to sit at 50mph.

 

[wilf.winter]

Hi
I think you are finding what I found when I switched from BMW to MB, whilst the BMW's (four cars over three model types) always exceeded the MPG quoted figures the Mercs sometimes don't even get near.
My auto estate which mainly covers longish continual journeys at all times of the year varies from the mid thirties to very low fourties. I find it is around 10% worse in winter than summer and the climate control seems to make no difference to fuel consumption.
I hope this helps you.
Wilf

 

[Pzd]

Looking at the 'official' mpg figures for your car and mine, yours is 30/53/42 and mine is 28/53/41 so not much difference. This morning I got 37.5. I had the cruise set to 80 and virtually no traffic to fight through when I hit the town bits. Normally, I am in heavy traffic, so motorway speeds are 40-60 with occasional blasts to 90+ when there is a big enough clearing. I don't use the cruise and then stop-start etc through the towns. After all that, most mornings I get 41!. I doubt it's they tyres. I have 245's all round and regularly drive in heavy rain. It possibly knocks 1mpg off but thats all.

So, fixed 80, on cruise control appears to be bad
60-90 but possibly more gentle on the throttle and slower up hill due to traffic seems to be good

You quote a very specific average of 81. I presume that's off the computer. In my experience, to average 81 you need to be doing 100 at times. That means quite a bit of acceleration, slowing (brakes?) and acceleration again, plus anything over 70 and you'll get an exponential reduction in economy as I've found above.

38-40 whilst certainly not brilliant, sounds realistic given the circumstances, but if you want better, I'd drop the speed to 75 and try to be as gentle as possible, letting the car coast down rather than braking - That small change in style made a dramatic effect on my E240. You should see 45. You won't see 50+ unless you are happy to sit at 50mph.

Hi!

I was talking about 81 because I tuned the cruise control to 130 kph, and since there was no traffic I managed to do 240 km (150 mil) without changing speed.

Last summer I when I was cruising to Algarve, I did 500 km on motorway 75% at 94mph and the rest at 112mph, always with cruise control, with outside temperature of 30º (at night! I live in Portugal), with the AC always on I did 36 mpg (quite good I think). Is it possible that due to the Auto Gearbox, when the ride includes a a lot of gear changes the consumption raises more than a manual one?

PZD

 

[jberks]

Traditionally, autos always use more than manuals. Not relevant at motorway speeds but round town yes, a manual will be better as you can hold a higher gear and the auto uses more energy to drive it, plus the slip of the torque converter - it all adds up.
It may be worth using some injector cleaner. If they are a bit gummed, you may not be getting a clean spray which will reduce burn efficency and increase mpg as a result. Worth doing and ruinning with fuel with added detergent. We have BP Ultimate / shell optimax etc over here.

 

[robbi-wan]

Hi All,

I recently had to do a christmas run to see relatives etc, which involved travelling from coventry-somerset-weymouth then back to Cov. Upon my return i was delighted to find that the average mpg on the second day, some 260 odd miles, was 51.9mpg!! Considering half of this was on A-roads, which in dorset are a pain in the ar$e, and the second half was M5 at 85-95mph i was suitably impressed. By the time i ran out of nerve and re-visited the diesel shop; i had done 530 miles to one tank!! (Personal Best!! )

'Normal' driving (work etc) usually averages approx 45'ish mpg and a max of around 460 odd.
rob

 

[tamrsoft]

Are trip computers acurate

I would be interested to know whether the consumption figures quoted by the various members was based upon fuel filled v. miles covered or by the readings from the trip computer. I did a comparison over about 500 miles and found the trip computer values to be about 10% optimistic over actual fuel consumed v. miles covered. My E220 CDi trip computer showed average consumption over 500 miles as about 46 mpg whereas the measured calculations gave 41-42 mpg. Anyone found found similar discrepencies ?

 

[jberks]

Admittedly I've only done one check, but mine turned out to be around 1-2mpg pessimistic!

 

[Pzd]

Mine are based on real check since my car doesn't have trip computer...