mpg is now a disaster

[tim.100]

Hi

My diesel ecomomy is much better in the summer, seems to drop in winter, E300 Turbodiesel averages 36 in summer, 31-32 in winter never able to get to the reason why, it just does. Reasons anyone?

230K

This is exactly what happens with my C250TD. 34-ish summer, 31 in winter. Same driving pattern. I would guess it has to run richer for longer from start-up.

The electrical demands are also greater - wipers, interior fan, A/C, rear windscreen heater, etc... However this is probably only 1-2 KW from a 120KW-ish engine

Regards,

Tim

 

[mobeyone]

today, i am on 175 miles and less than a quarter to go!!!!!!!!!!!

when compared to say two months ago i was getting around 220!! and on a trip to london nearly got 400 miles!

 

[230K]

This is exactly what happens with my C250TD. 34-ish summer, 31 in winter. Same driving pattern. I would guess it has to run richer for longer from start-up.

The electrical demands are also greater - wipers, interior fan, A/C, rear windscreen heater, etc... However this is probably only 1-2 KW from a 120KW-ish engine

Regards,

Tim

Well checked tyre pressures and adjusted from 26psi up to the recommended 32F 33R and with a lighter foot, economy on the last fill went up to 34mpg 448miles for 59.2L, only checked tyres half way through the tank so heres hoping for the next fill.

230K

 

[dougal74]

This is exactly what happens with my C250TD. 34-ish summer, 31 in winter. Same driving pattern. I would guess it has to run richer for longer from start-up.

The electrical demands are also greater - wipers, interior fan, A/C, rear windscreen heater, etc... However this is probably only 1-2 KW from a 120KW-ish engine

Regards,

Tim

Outside of all the other factors indicated previously and in response to the Voyager CRD issue specifically the air temperature has a significant impact on the volume of fuel in the tank particularly diesel which has a higher freezing point than petrol. Basically it shrinks in cold weather. If you fill up first thing on a cold morning (with a fairly cold car) you will get more in your tank than if you do so later in the day when it is warmer. So outside of all the heater, driving style, tyres etc. issues, fill up first thing on a cold morning.

 

[skemball]

The average fuel consumtion meter obviously will 'lag' the actual 'instant' consumption - what i mean is that you may well be averaging your normal 40mpg by the time you get to work but the meter will have factored in the higher than average consumption during the cold warm up driving period.

If your journey to work was say 100 miles further than currenty i think you would find it would get up to 40mpg

for sure in winter the engine will take much longer to warm up if you initial journey is in town traffic and will use more fuel. Esp' with the auxilliary heater in operation.

I havnt seen any difference in my consumption levels all year but i spend most time on motorways. I average 40mpg but can get 50mpg at a steady 60mph on cruise but it takes 100 miles or so to climb up to this figure. Round town on a warm engine somewhere around 26mpg. On a cold start round town drive of say 4 or 5 miles it doesnt usually go over 20mpg.

 

[mobeyone]

just checked my tyre pressure - front: 28 + 29 rear: 27 + 25!!!!

 

[W210 Fan]

just checked my tyre pressure - front: 28 + 29 rear: 27 + 25!!!!

get um` up to 51 he he. I havnt checked my tyre pressures since the man who just refurbed my rims pumped them up at about 4:30. I will check them tommorrow as I dont want to go near the rims for a bit. What does it say on your tyres is the max and recommended?

 

[mobeyone]

get um` up to 51 he he. I havnt checked my tyre pressures since the man who just refurbed my rims pumped them up at about 4:30. I will check them tommorrow as I dont want to go near the rims for a bit. What does it say on your tyres is the max and recommended?

ill check em tomorrow and let you know.

i did used to run them on 44 rear and 42 front!

 

[Birdman]

get um` up to 51 he he. I havnt checked my tyre pressures since the man who just refurbed my rims pumped them up at about 4:30. I will check them tommorrow as I dont want to go near the rims for a bit. What does it say on your tyres is the max and recommended?

This thread has brightened up a dull day, W210 Fan. I've bonded with my W210 AMG in a way that defies logic but then who buys for the sake of logic?

Recommended pressures at 130mph+ on a full load are 41F/48R and add 4psi if warm. Otherwise, 32/33 plus 4psi etc for running granny to church. Anything else and uneven wear trashes the tyre long before time even if you do prefer canvas to rubber. I'm running my monoblocs on P Zero Nero and they come in at twice the price of the Fuldas.

Go for another E55 I say, but check the dealer stamps are for real plus the four-year/60,000 mile big overhaul (plus autobox oil/filter change, whatever the book says), which dealers mostly miss out even if the service log shows ticks. Only original invoices tell the true story and it can cost £1500 - £2000 done correctly. Then put your refurbed monoblocs on the correct car!

 

[glojo]

Well - i have noticed my mpg going down.

My car takes on average 44l of shells finest and i average around 22mpg around town and 27 on the motorway.

I am getting around 200 miles to a full tank now and i was very worried but ihave put it down to the weather..... grasping at straws...

Hi,
I've just tried to pm you, but you brimming over

Regards
John

 

[W210 Fan]

This thread has brightened up a dull day, W210 Fan. I've bonded with my W210 AMG in a way that defies logic but then who buys for the sake of logic?

Recommended pressures at 130mph+ on a full load are 41F/48R and add 4psi if warm. Otherwise, 32/33 plus 4psi etc for running granny to church. Anything else and uneven wear trashes the tyre long before time even if you do prefer canvas to rubber. I'm running my monoblocs on P Zero Nero and they come in at twice the price of the Fuldas.

Go for another E55 I say, but check the dealer stamps are for real plus the four-year/60,000 mile big overhaul (plus autobox oil/filter change, whatever the book says), which dealers mostly miss out even if the service log shows ticks. Only original invoices tell the true story and it can cost £1500 - £2000 done correctly. Then put your refurbed monoblocs on the correct car!

I know your right but its not fiscally possible right now while I`m looking for a new job but I will own one, and soon hopefully, but it must be black as I have a black car and it looks great,

 

[Birdman]

I know your right but its not fiscally possible right now while I`m looking for a new job but I will own one, and soon hopefully, but it must be black as I have a black car and it looks great,

Mine's black too! Way to go!

I may be looking for a good home for my 2001 E55 in the New Year, depending on the cost to exchange. Thinking of going private as it's not the sort of car the dealerships around here (Suffolk) know much about.
If you're in the market for one, say in the next three/six months, you might let me know. This one is a good example of a pristine high (82K) miler, which makes it a bit of a steal.

Have a good Cristmas!

 

[mark.t]

ignoring the state of the tires which I shall soon change then what are the recommended PSI for 235/40/18`s and 265/25/18`s, I have worked with a lot of race drivers and the majority would prefer slightly higher pressures and the associated better handling offset against comfort, I guess I have just picked this up.

I was not attempting to boast about what I do more advertise the factor of safety we designers build into things, On closer inspection in the last 5 mins the two fronts have sidewall chunks that are not down the canvas and are not on the tread indicator thus legal and 1 of the rears has a small sidewall chunk missing that is `just` down to the canvass and look relativly new so have loads of tread. I was trying to get over if you have a rip in the side of your tire your not going to die in the next 10 miles as I have pushed mine harder and they are fine but I now agree possibly not the safest thing to do, i have little reguard for my own safety and do things that make most mortals wince in a workshop, but I have never been to hospital or even cut myself at work (spent 9 years working as a toolmaker/product designer, big, heavy, dangerous life threatening machinery does tend to give you a more relaxed view of the world when you can operate it without bleeding), however I do need to be reminded of the safety of others, and as you correctly put it I will probably be fine, just pity the poor surf I may crash into.

I shall put new tires higher up my list of priorities, Im sorry if I caused any offence to anybody reading.

Night night Gents.

http://mbclub.co.uk/forums/showthread.php?t=4259 you are mad i am not going to post bad rep points it will mean nothing to you keep your madness to yourself and don't put others at risk read this you numpty get em off quick christ you put others at risk if i could have stopped i would have tore him a new ****hole

 

[Dieselman]

There are three principle reasons for reduced diesel fuel economy in Winter.

1. The fuel is reformulated to offer a lower waxing point, which lowers the cetane value.
2. Additional load placed on the engine in the way of electrical loading.
3. Thermal losses are greater so more energy is lost to the atmosphere.