Is my MPG terrible?

Discussion in 'Tech/Mech General' started by streetdaddy, Mar 28, 2011.

  1. streetdaddy

    streetdaddy Read Only Funster

    Joined:
    Mar 13, 2011
    Messages:
    38
    Likes Received:
    0
    Location:
    London
    I have a 1998 Elddis Autostratus EK SK. Peugot Boxer 1998cc petrol engine. I've just taken it on a good length trip for the first time, about 600 miles, and according to the app on my phone the MPG is around 15 traveling at a steady 50 MPH.

    This seems quite bad to me, and much lower than what the previous owner claimed. Its 3200 kg and reading around some posts on here it seems like I should be getting more like 25-30....

    Should I be worried?
     
  2. callumwa

    callumwa Read Only Funster

    Joined:
    Jan 16, 2011
    Messages:
    4,113
    Likes Received:
    4,517
    Location:
    Tyne & Wear, sometimes..
    Yes very.......!
    sorry......

    unless, are you sure its not your iPhone....
     
  3. streetdaddy

    streetdaddy Read Only Funster

    Joined:
    Mar 13, 2011
    Messages:
    38
    Likes Received:
    0
    Location:
    London
    I did some calculations myself using litres and UK gallons:

    4.1 miles per litre
    18.6 miles per gallon

    What sort of mechanical problem might this point to? I had it mechanically inspected before I bought it... :cry:
     
    Last edited: Mar 28, 2011
  4. Heyupluv

    Heyupluv Read Only Funster

    Joined:
    Oct 7, 2008
    Messages:
    3,862
    Likes Received:
    1,585
    Location:
    France,
    Hi...Maybe because it is Petrol....Or maybe because of the engine size! under powered 1998cc petrol engine for the weight of 3200kg......BUT I would have thought you should be getting more than 15 mpg:cry:....more in the region of 20 to 25 mpg.

    Mel :thumb:
     
  5. scotjimland

    scotjimland Funster Life Member

    Joined:
    Jul 25, 2007
    Messages:
    28,934
    Likes Received:
    25,574
    Location:
    .
    Has it been serviced recently ? If not change the air filter, a clogged filter will reduce MPG .. also change spark plugs, engine oil and filter.

    Check tyre pressures , low pressures will reduce MPG

    Reduce load, ie empty water and waste tanks before journey

    Do you have a roof box ? If so remove it.

    Driving style is more important than cruising speed.. accelerate gently, change up gears as soon as possible, anticitpate roundabouts etc .. every time you touch the brakes you are throwing money out the window.. try driving without needing to brake...
    Drive as if you had a glass of water on the dash.. and don't spill it.
     
  6. simsy56

    simsy56 Funster

    Joined:
    Nov 6, 2008
    Messages:
    2,997
    Likes Received:
    12,240
    Location:
    Ramsey, Isle of Man.
    That last paragraph is so true. l was told this word for word when l was 16, many years ago. And, "drive as if you had a glass of water on the dash...and don't spill it", is embedded in my brain. Also l was told, "your right foot controls your wallet".

    Craig
     
  7. tofo

    tofo Funster

    Joined:
    Oct 1, 2007
    Messages:
    6,584
    Likes Received:
    6,212
    Location:
    Kirby cross further from londin
    consider a gas conversion and if you live inside the m 25
    NO worries for the LEZ charge

    my 1998 1'9turbo diesel gives about 25mpg
    thats on a swift overcab 520
    as others roof box is a drag
    could brakes be binding after a long (winter)rest
    ie pistons not returning into calipers
    hand brake not fully off
    lack of oil at gearbox
    just a bit from those above adds up


    dont labor the engine drop a gear
     
    Last edited: Mar 28, 2011
  8. normanandsue

    normanandsue Funster

    Joined:
    Dec 31, 2010
    Messages:
    1,296
    Likes Received:
    3,850
    Location:
    Dunfermline - Scotland
    We run a 1998 Autosleeper on a Peugeot Boxer 1998cc Petrol engine (see picture) and on our trip to France last year we calculated our fuel consumption to be 20 mpg on motorway and main roads with occasional speeds of 70mph.
    I am not sure if your vehicle is heavier than ours but no doubt you can judge by the pictures.
    My conclusion is if your vehicle is similar to ours then your consumption is on the high side. As others have said I think the 1998cc petrol engine is a underpowered for the job required, which will mean more 3rd and 4th gear work than would be experienced with a more powerful engine and of course this increases consumption.
    Carrying full tanks of clean and grey water will also add greatly to the weight so to improve fuel economy empty grey water as often as you can and only fill your fresh water with as much as you think you will need till you can refill again.
    A good service and tuning by a reputable service dept. might improve efficiency but I doubt it would improve it by 5 mpg.
     
  9. buttons

    buttons Funster

    Joined:
    Aug 27, 2009
    Messages:
    12,872
    Likes Received:
    10,679
    Location:
    Hertfordshire
    Some years ago I drove a new Kontiki to Spain and back, it was petrol and as I recollect I had difficulty maintaining 17-18mpg. The wind was a big factor. I think 20mpg would be as much as you could expect but I couldn't achieve that.
     
  10. breeks

    breeks Read Only Funster

    Joined:
    Jun 15, 2010
    Messages:
    135
    Likes Received:
    24
    Location:
    glasgow
    fuel

    :Sad::Sad:i had the same van which had been converted to lpg.the way i saw it was the 2ltr engine wouldnae pull you out of bed underpowered for the size of van i remember going as fast as i could going down hill so i could get up the hill coming up it was areal petrol and gas guzzler.so if you can manage 20mpg your doing no bad.
     
  11. paulmold

    paulmold Read Only Funster

    Joined:
    Jun 15, 2009
    Messages:
    895
    Likes Received:
    301
    Location:
    North Wales
    My van conversion Autosleeper Symphony on a petrol Boxer weighs 3200kg maximum and I get around 23mpg, hardly changes between running around or motorway runs. I haven't got the overcab drag of a coachbuilt but even so 15mpg does seem high.
     
  12. streetdaddy

    streetdaddy Read Only Funster

    Joined:
    Mar 13, 2011
    Messages:
    38
    Likes Received:
    0
    Location:
    London
    Thanks for all the tips... It's definitely a large motorhome relative to the engine size. I realised I was using US gallons. I changed the app to user Imperial Gallons and according to that I am getting 17-19 MPG depending on speed eg. 50 MPH vs 60 MPH

    From reading through some of your responses, especially normanandsue, it seems that's not to far off what I should expect considering they have the same engine on a smaller/lighter coachbuilt (tho they're doing 70MPH)...

    Air filter is perfectly clean, but I need to check the tyre pressure.

    I may call a few motorhome workshops and ask if they can quote on checking out any potential mechanical issues that might effect the MPG. I had the cam belt changed recently but if that made it worse for any reason (incorrectly replaced?) I don't have any MPG data from before I had it changed to compare with... Will have to call the previous owner and hope for a straight answer.
     
  13. Dave Cowell

    Dave Cowell Read Only Funster

    Joined:
    Apr 1, 2011
    Messages:
    2
    Likes Received:
    0
    Location:
    Lancashire
    Looks a little on the high side

    Hi All

    new to the forum and reading with intrest all the fuel posts I have just purchased an Elddis based on 2.0L diesel engined peugeot boxer and am looking already at an ECU remap to improve the mpg may be something to look into the remap seems to be specific to make and engine type and the outcome of mapping from some other posts elsewhere and in testimonials seems to offer a 10 to 15% increase in economy lets see if this is the case :RollEyes:

    Dave
     
  14. streetdaddy

    streetdaddy Read Only Funster

    Joined:
    Mar 13, 2011
    Messages:
    38
    Likes Received:
    0
    Location:
    London
    Will be interested to here the outcome of yours Dave. I'm getting a diagnostic done sometime in the next few weeks and will report back.... On some level I'm resigned to the fact that my MPG may not be great. I'm a complete motorhome newbie so I guess it's just part of the learning process :thumb:
     
  15. Dave Cowell

    Dave Cowell Read Only Funster

    Joined:
    Apr 1, 2011
    Messages:
    2
    Likes Received:
    0
    Location:
    Lancashire
    will advise

    Hi

    Will let you know as soon as i have some good info, reading other posts on the forum WOW power seem to know there onions so may be in touch with them in the next week or so

    D :BigGrin:
     
  16. wasp

    wasp Funster

    Joined:
    Dec 21, 2008
    Messages:
    2,726
    Likes Received:
    1,060
    Location:
    Mansfield
    Do not forget, your M/H has the aerodynamics of a brick so this would also affect the mpg and performance :thumb::thumb::thumb::thumb::thumb::thumb:
     
  17. Gonewiththewind

    Gonewiththewind Read Only Funster

    Joined:
    Sep 13, 2007
    Messages:
    854
    Likes Received:
    35
    Location:
    Lancashire
    Hi. Mine is a Pug Boxer 1.9 Diesel. I thought mine bad enough at 24/25 mpg.:Rofl1:

    Don
     
  18. streetdaddy

    streetdaddy Read Only Funster

    Joined:
    Mar 13, 2011
    Messages:
    38
    Likes Received:
    0
    Location:
    London
    How much does your rig weigh out of curiosity?

    * Google'd yours, it looks like it's much the same layout as mine... Maybe I can get some extra MPG out of it with a tune :pray:
     
  19. wivvy's dad

    wivvy's dad Read Only Funster

    Joined:
    Jun 22, 2010
    Messages:
    3,218
    Likes Received:
    1,807
    Location:
    48.066895,12.862673
    What tune would you like.......?

    I can do Moon River..

    Or how about... Over the Hills and Far Away?

    No.....Jalihouse Rock then
     
  20. callumwa

    callumwa Read Only Funster

    Joined:
    Jan 16, 2011
    Messages:
    4,113
    Likes Received:
    4,517
    Location:
    Tyne & Wear, sometimes..


    I think "streetdaddy" actually wants a "Depeche Mode" classic tune....








    "I JUST CAN'T GET ENOUGH, I JUST CAN'T GET ENOUGH"....
    :Rofl1::Rofl1::Rofl1::Rofl1::Rofl1::Rofl1::Rofl1::Rofl1::Rofl1:
     
Loading...

Share This Page