Thread: E39 M5 Owners
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Old Jan 13, 2009 | 08:20 PM
  #8  
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JjCoDeX75
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From: Exeter
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The only way I would get anywhere near that motorway mpg with my old one, you would need a sturdy tow rope, and a willing towing vehicle.

I did a lot of miles in mine, and it was simply not capable of exceeding 25mpg at any time (except when free wheeling down a hill)

Also, as stated by 3drstretch, dont forget the way the engine can use oil - particularly the early ones.

Mine would use 1 litre of oil for every 600miles covered, and when taken to bmw, they stated that this was within tolerance.

JJ



Originally Posted by Ian M
ve extensively serviced the vehicle and ensured the MAFs are sending the correct volumes to the ECU, reset all adaptions, fixed all faults and done some logs.

Engine cold run to work. Never gets hot as drive only 1 mile.
= 12mpg

Hot engine, round town. Not hammered, nice gentle driving using the immense torque.
= 18mpg

As above but utilising A roads too.
= 21mpg

Cruising on flat motorway in 6th with cruise control engaged.
= 27 (saw 30 for a while with Dan, but not representative IMO)

Giving her some beans down the country lanes. Hard on it, never below 5000rpm.
= 8mpg.


Seems to answer the question quite well, although i am a little surprised at the cruising figure i wouldnt of expected it to be that good.

Last edited by JjCoDeX75; Jan 13, 2009 at 08:23 PM.
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