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FUEL ECONOMY

Discussion in 'General Mercedes-Benz Related Discussion' started by gbv, Apr 11, 2012.

  1. gbv

    gbv Member

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    Your Mercedes:
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    Have a E220CDi Avantgarde. Looking into how I can improve fuel economy - after doing all the usual things.
    Firstly - has anyone any experience of CHIP TUNING Diesel Boxes - which cost between 60-100 pounds - supposedly very easy to fit and give a 20%increase in BHP and Torque and around 15% improved MPG. Has anyone seen any improved MPG with these- if so how much ???

    Secondly- It is suggested to use a "sports air filter" to improve air intake therefore fuel economy. Have come across K&N Air Filters - which are made with special cottton fibres in Oil - These come with a Lifetime warranty - but have to be washed every 50000 miles. They supposedly give Better airflow therefore better economy. Anyone tried these or are there any other Air Filters which help improve MPG ???

    Any other suggestions for improving MPG welcome......
     
  2. paul hayward

    paul hayward Senior Member

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    all MB sold..V70R now ;-)
    [Any other suggestions for improving MPG welcome......[/QUOTE]

    drive it gently:D:lol:...sorry couldnt help it:lol:..... i wouldnt of thought anything "sports" is gonna help your MPG ? i had a V5 2.3 bora and had a air induction kit on it ...although it sounded nice she liked the fuel even more after that:lol:

    others will be along shortly with more sensible ideas than mine im sure:D
     
  3. Silver_Star

    Silver_Star Senior Member

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    Your Mercedes:
    W203.006, S211.208 Land Rover 90
    You won't increase economy by chipping and installing an air filter.

    An E220 CDI should crack 50mpg on a run with ease.

    The key to getting good MPG on these cars is to try and keep them moving. Plan ahead, anticipate when other traffic is slowing down, lift off and "coast" the last bit to the traffic lights etc. Getting 2tons moving from standstill will use a lot of fuel regardless.
     
  4. M80

    M80 Senior Member

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    If you have a DPF, removal would improve the MPG, but it's less likely you have one anyway.
    The EGR mod can save a few mpg, do a search here it's inexpensive and not over complicated to do.

    Re mapping might give some better MPG but there aren't many believe it. Forget the tuning boxes they just cheat the OBC, no improvement but it reads as though it is.

    If MB can't design the air filter to give the correct, and most efficient mix it would be a poor show.
     
  5. st4

    st4 Banned

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  6. ilton

    ilton Banned

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    maintain good tire treads and air pressure
     
  7. wilsodg

    wilsodg Senior Member

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    As above. If you want to improve MPG, the biggest improvement comes from you - how you drive the car. You can tweak bits here and there to save a few mpg, or you can drive differently to save 10's of mpg. All manufacturers these days enable high economy for official stats if you want to drive it right. Moving off consumes the most, so try not to stop. Speed makes a huge difference - keep it between 50-60 will likely give you at least 10mpg more than 70-80.
    Cruise control on flat is ok, but when you come to an incline it will burn a lot more trying to hold the speed.
    Appreciate the economy if you aren't in a rush, and switch the display to show something other than MPG if you want to enjoy the performance.

    Sent from my BlackBerry 9900 using Tapatalk
     
  8. OP
    gbv

    gbv Member

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    Always driven economically - no matter what car I had. No excess weight, windows closed,right gears, serviced regularly,correct tyre pressures etc etc. Unfortunately have lot of short journeys where engine does not even reach running temperature. Stop start in Town traffic cannot be avoided. Also mainly driven Manual before so more scope for economy - feel bit helpless in an Auto with that regard. Thanks for ALL your comments - Have learnt a few things - majority are common sense and knew those and agree with them.
     
  9. jberks

    jberks Senior Member

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    As above really. You could possibly get a remap to detained the car and improve economy but potentially the reduction of power can backfire. Chips and boxes only improve economy on a manual as the allow earlier up shifts. Even then you'd probably never save the cost of the chip.
    So drive gently, anticipate, coast. I view the brake pedal as a fuel dump and try to drive not using it. It's a smug feeling when you see all the cars in front braking and you're the first in the line that doesn't. I like to think it goes some way to reduce congestion further back too.
    If you want to make mods then there are some Eco low drag tyres you can buy but engine wise - nah
     
  10. Neil H

    Neil H Senior Member

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    Your Mercedes:
    Current: RRS Autobiography/F-Type R V8 AWD Previous: CLS 400 W218 / CLS 350 CDI W218 / ML350 W164
    I managed a stunning 33mpg in my wifes ML350 on a 80 mile trip earlier this week. Very proud of myself!
    I think car choice also plays a part, a good friend of mine just bought a Golf Bluemotion, he's managing 75-80mpg with relative ease.
    I have just sold my SAAB Aero in advance of the CLS arriving and I was genuinely lucky to get more than 28 out of that in normal driving.
     
  11. robparker

    robparker Senior Member Authorised Forum Supporter

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    Tyres set to exploding is what makes the biggest difference to my car, that and the other tips above!
     
  12. umblecumbuz

    umblecumbuz Senior Member

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    Being a heretic, I don't agree that a K&N filter, or for that matter a chip, will make no difference to economy. In my experience they CAN - and have when I've tried - but often don't because they encourage more spirited driving.

    But by far the best economy device is a feather-foot. It encourages anticipation, smooth driving, and minimum use of the brake pedal. Imagining an egg between your foot and the accelerator pays dividends. And the whole car benefits also.

    Baz
     
  13. Alex M Grieve

    Alex M Grieve Senior Member

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    you've been peeking again Baz - and I thought I had been sooo discreet! :D
     
  14. Dosco

    Dosco Active Senior Members

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    10/10 to that, just how I was taught to drive. Mind you the man in front with the red flag steady me up a bit;)
     
  15. umblecumbuz

    umblecumbuz Senior Member

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    Ever stepped out of your car with egg on your shoe?

    Yesterday evening I did 90 miles (one way) to collect a new lathe. I deliberately drove feather-footed there, and hard-pressed to meet an evening deadline on the return journey. 56mpg there - 46 mpg back.
    OK, the lathe was heavy, which made a difference - but not ALL the difference.

    Baz
     
  16. wilsodg

    wilsodg Senior Member

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    I picked up a new trailer a few weeks ago - heavy foot on way there (no trailer 70-85mph) 30mpg; light foot on way back (towing trailer not more than 60mph) - 40mpg. Embarrassingly, this was about the best I ever got on a long run with this car!

    Sent from my BlackBerry 9900 using Tapatalk
     
  17. OP
    gbv

    gbv Member

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    exploding tyres

    What is recommended and how much is "exploding" ??

    My Tyres (235-45-17) Recommended Pressures are 32 (F) and 35 (R). But I have 38 all round. Can "feel" the bumps- but I think extra pressure helps with MPG.

    Any opinions on 38 - or what is a safe pressure ???
     
  18. umblecumbuz

    umblecumbuz Senior Member

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    When I first got my 270cdi, it had a tendency to wear the inner edges of the front tyres. Now I run all four at 40psi, and this tendency is minimised. Yes, I feel the bumps slightly more, but steering sharpness and the ability to 'tuck in' on corners (ie - 'throttle-steer') is better. Rolling resistance is less, so economy must benefit.

    Obviously there comes a point when overpressure becomes detrimental to handling - particularly braking. This must vary from one car to another, just as tyre wear characteristics will change with increased pressures. I think I've found the optimum for my car, but I can't speak for others.

    Baz
     
  19. S.Speed

    S.Speed Senior Member

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    I am toying with 1 psi all round in mine..
    I have a theory that if you can get the car to drive on the metal rim then the rolling resistance would be minimal..:D
     
  20. Alex M Grieve

    Alex M Grieve Senior Member

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    That should certainly wear the centre of the tread down to meet the worn edges Baz.

    Once you achieve uniform wear across the full width of the tread you could revert to the recommended pressures? ;)
     

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