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Thread: Worst MPG ever

  1. #1
    Join Date
    Dec 2007
    Location
    London
    Posts
    374

    Worst MPG ever

    Yes it's very cold

    And during this period every journey is under 2 miles

    But 85 miles for 17 litres?

    That equates to 23mpg!!!
    Paul
    Pure 2000 W, LHD 599cc - Engine Rebuilt Feb 08 - sold
    Passion 2000 W, LHD 599cc - Engine Rebuilt Mar 09 - sold
    Passion 1998 T, LHD 599cc - Engine Rebuilt Apr 10 - sold
    Cabrio 2001 Y, LHD 599cc - Engine Rebuilt Jul 10 Replaced Oct 16

  2. #2
    Join Date
    Mar 2012
    Location
    Burnley
    Posts
    1,338
    I can get my diesel down to just over 30 mpg in cold weather with short journeys.

  3. #3
    Join Date
    Dec 2007
    Location
    London
    Posts
    374
    Quote Originally Posted by Mjolinor View Post
    I can get my diesel down to just over 30 mpg in cold weather with short journeys.
    Yes, but nothing to be proud of
    Paul
    Pure 2000 W, LHD 599cc - Engine Rebuilt Feb 08 - sold
    Passion 2000 W, LHD 599cc - Engine Rebuilt Mar 09 - sold
    Passion 1998 T, LHD 599cc - Engine Rebuilt Apr 10 - sold
    Cabrio 2001 Y, LHD 599cc - Engine Rebuilt Jul 10 Replaced Oct 16

  4. #4
    Join Date
    Nov 2013
    Location
    Central Scotland
    Posts
    441
    You got a 599cc petrol 450.........

    I used to get around 42 to 52 MPG in my first Smart, a 599cc petrol 450.
    It was better than the 451 petrols are getting today, LOL!

    Think you would have to drive some decent runs to get a better MPG.
    The worst thing for a cars MPG is to do just short runs all the time.

    PS....Is your calculation right, as if i remember there was two different sizes of fuel tank on the 450's.
    Just saying
    Last edited by colin2x2; 25-02-2018 at 11:15 AM.

  5. #5
    Join Date
    Jun 2015
    Location
    Somewhere on the Wirral
    Posts
    131
    PS....Is your calculation right, as if i remember there was two different sizes of fuel tank on the 450's.
    Tis correct, the pre-2003 petrol 450's had a 22 litre fuel tank and later ones had 33 litre fuel tanks in the UK.

  6. #6
    Join Date
    Apr 2013
    Location
    the Netherlands
    Posts
    219
    Check your thermostat , a bad working thermostat can cause high fuel consumption

  7. #7
    Join Date
    Mar 2012
    Location
    Burnley
    Posts
    1,338
    I don't think there is owt wrong with it. My 450 petrol could be significantly under 30 and as I just said, (as a statement of fact, not a statement of pride) my diesel is only just over 30 on short runs in cold weather.

  8. #8
    Join Date
    Jan 2016
    Location
    North Somerset
    Posts
    17
    Our recently purchased 2008 ForTwo Brabus is achieving 40mpg. Mixture of short town driving and 15 mile (each way) commute.

    Considerably better than My Jag XFR!!

  9. #9
    Join Date
    Dec 2007
    Location
    London
    Posts
    374
    Quote Originally Posted by ossy View Post
    Check your thermostat , a bad working thermostat can cause high fuel consumption
    Very good point, but I don't think I have a problem there

    The engine does reach operating temp (three blobs) within about three miles, but during this 85 miles the car rarely got up to temp

    Obviously I am using lots of electrics too, heated seats, fan, headlights, and the only way to be sure to start in the morning is to leave the battery on charge

    I have now wired one of these in to make that easy to do

    s-l200.jpg
    Paul
    Pure 2000 W, LHD 599cc - Engine Rebuilt Feb 08 - sold
    Passion 2000 W, LHD 599cc - Engine Rebuilt Mar 09 - sold
    Passion 1998 T, LHD 599cc - Engine Rebuilt Apr 10 - sold
    Cabrio 2001 Y, LHD 599cc - Engine Rebuilt Jul 10 Replaced Oct 16

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