How much??? Motorhome MPG

Discussion in 'Motorhome Chat' started by longdog, Apr 1, 2014.

  1. longdog

    longdog Funster

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    I have never really looked at the fuel consumption on my motorhomes, I am a relative rookie having only discovered motorhoming 2 years ago and enjoyed several holidays and weekends in the 2001 Hymer Swing with a Fiat 2.8 JTD that I bought to test the water.

    I always thought that was a bit heavy on the juice but I put it down to being relatively old technology, so when I bought a low profile 56 reg CI Cipro 55 on a Mercedes Sprinter chassis I was expecting an improvement......!!!

    Well we have just had a long weekend in Hertford on the Balls Park Camping and Caravan Club site there, (highly recommended, they are not called the friendly club for nothing :thumb: ), I drove over 450 miles and logged my fuel usage on a full-to-full basis. What a shock I had when I found I had averged 20mpg and that was me driving like a nun for goodness sake!!! :Eeek:

    Where do people get these 30mpg figures from? When they are parked up with the engine ticking over perhaps?

    20mpg is not really acceptable so I am thinking of cutting my losses and selling the CI and getting another older van now :cry:
     
  2. TheDentons

    TheDentons Funster

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    we have a 2.8jtd on a swift kontiki on the motorway at a constant 60 mph we can get 30 mpg but it does drop down when we are on A roads
     
  3. bernardfeay

    bernardfeay Read Only Funster

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    We have a 2.3 diesel Hymer Exsis 2004. I stick the cruise control on for most of the journey and stay with the trucks at 56 mph. We get 30 to the gallon. I don't think you are going to get very much better than that.

    It's the speed on the motorway that is the easiest thing to adjust before getting rid.
     
  4. Bellini

    Bellini Funster

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    What's your annual motorhome mileage?

    Did you honestly change just to get better fuel economy?

    It just seems a trifle hasty to change your MH based purely on how much fuel it consumes. There's got to be more to your CI than that?!
     
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  5. hilldweller

    hilldweller Funster Life Member

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    They are all ex-funeral drivers.

    Speed is everything when pushing a brick wall through air.

    And remember the air can be moving, do 60 into a ( low ) 10 mph headwind and you are paying for 70 mph fuel.

    We get 25mpg if I keep to 60 or below but I can drop it to 20 by using 70 a lot.
     
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  6. Spottycatz

    Spottycatz Read Only Funster

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    We've done 4500 miles in Europe since August and over a mix of Spanish and French motorways and A and B roads, my on board tripometer tells me the van has an average of 28.4 miles per gallon.

    I'm driving a Fiat Ducato Automatic, with a 160 Multijet.

    I'm pretty pleased with the mileage I'm getting:thumb:
     
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  7. tonka

    tonka Funster Life Member

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    Arrived back last night from my longest ever trip.. Covered 5,600 miles from here in the Midlands, down through France, Spain and 2,100 miles around Morocco. Then back again.. So some very varied and mixed driving.. Usually 90km / 60mph on motorways.
    My van is a fiat 2.3 130bhp euro v , Coachbuit with overcab bed. Running at 4,100kg as an average (more until we started on the beer)..
    The on board overall average was 27.9mpg... I really tried for that 28mpg but could not make it happen...

    I have recorded part journeys into the 30+ bracket but that does not last long..
    Last year I was slightly lower at 26.5mpg but it does seem to have improved since a recent service.
     
  8. Techno

    Techno Funster Life Member

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    Mine too can read that in France but brim to brim is 4mpg less
     
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  9. DeuceBG

    DeuceBG Funster

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    Is that the van's computer?
    If so then I can almost guarantee that it's lying through its teeth because they all seem to.
    I have one on my X5 and another on my Triumph Tiger and to say that they're both "Optimistic" is an understatement.
    Generally both overstate by around 4 - 5 MPG.
     
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  10. sdc77

    sdc77 Funster

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    We get approx 26mpg in a 3.0 ducato (Euro 4 160bhp).. But that's carefull driving with cruise on.
     
  11. longdog

    longdog Funster

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    I didn't buy the CI for fuel consumption reasons but I did think one of the benefits of changing from an older technology diesel with an over-cab bed to a more modern engined motorhome with a low-profile may have resulted in improved fuel consumption.

    The Merc has cruise control so I set it at 60mph for the length of the M4 and some of the M25 so there wasn't really too much driving on A roads. I'm not heavy footed either, so it was more of a shock to find 20mpg for the trip.

    Just as an aside, I pulled into Reading services on the way home to find diesel was being sold at 148.9p per litre. I'm not tight but I drove straight out and turned off at Junction 15 on the M4 as there is a Sainsbury store just 3 miles off the M4 and the diesel was 134.5p per litre on Sunday, well worth the 6 mile detour! lol
     
  12. Yorick

    Yorick Funster

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    You should see the MPG in my space ship when I am on my astronaut missions.
     
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  13. chaser

    chaser Funster

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    Never thought I would be writing this, as when tyre pressures has raised its head on this forum iv always gone for lower pressure 60/65 but when we got the van out after Xmas just thought I would try 70/75 and wouldn't believe it but mpg has gone from 23-25 to 27-30 over quite a few fill ups, up mountains down valleys in wales and Yorkshire with a bit of motorway thrown in.
    I know it's not a lot and I'm not really bothered but it does just go to show little things can make a hell of difference.
    Ride is harder though , makes the pots rattle a bit more so shall probably try with a bit less psi :thumb::thumb::BigGrin:
     
  14. tonyidle

    tonyidle Funster

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    So far I haven't done enough miles in my (new to me) 2.8JTD Hymer but I have had time to check the speedo accuracy against a satnav - and it reads over 10mph fast at 65mph - be careful what you base your calculations on. My last A class with 2.5td averaged 22mpg throughout my usage - based on odo readings & a continuous record of fuel purchased over the past 9 years.
     
  15. DeuceBG

    DeuceBG Funster

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    Using Cruise Control is not actually the most economical way to drive.
    You can improve your economy quite considerably by manually (or whatever the foot operating equivalent might be) controlling your speed.
    That said, I use CC as often as possible in the car...
     
  16. sadlonelygit

    sadlonelygit Read Only Funster

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    our old 644 with the 2.5TD and well heavy used to average 28mpg over a 6000 mile tour.
    no idea what the merc does yet as we haven't done a brimful............yet!!!
     
  17. Bellini

    Bellini Funster

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    I think that's part of your problem. I have cruise on a few of my cars and find it uses more fuel as the system uses quite heavy doses of throttle to maintain progress up hills and when on 'resume'.

    Far better, in my experience, to use the throttle manually and be light / gentle with it.
     
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  18. sdc77

    sdc77 Funster

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    I have to say that every vehicle I have had with cruise control has been more economical by far when using cruise control... (on motorways and similar roads)
     
  19. John Laidler

    John Laidler Funster

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    If I was the OP I would get it checked by a diesel expert. It might be the injectors need looking at, air filter changed or something like that. Also check the brakes aren't binding and the tracking is correct.
     
  20. JeanLuc

    JeanLuc Funster

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    I think you should check it over a much longer period than one tankful. Our 2003 Hymer is based on a Sprinter 316 chassis and plated at 3,800 kg. We normally travel fairly near fully loaded - say 3,700+ kg.
    The engine is a 2.7 litre 5 cylinder unit, coupled to a 5-speed full auto box. I use cruise control extensively and normally run at 50-55 mph on standard roads, up to 60 mph on motorways.

    Over our entire ownership (45,500 miles - yes I really do log every fill-up and odometer reading) the average fuel consumption is 24.8 mpg.
     
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