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Old 10-09-2012, 01:17 AM   #187 (permalink)
EcoBus Driver
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Join Date: Oct 2011
Location: Germany
Posts: 54

EcoBus - '09 VW Multivan SL TDI 103 KW
90 day: 42.1 mpg (US)
Thanks: 4
Thanked 4 Times in 4 Posts
Originally Posted by tinduck View Post
As MetroMPG once said, and I can support this fully: I have yet to see a car which uses less fuel when cruising at higher RPM. Internal engine friction and pumping losses wil see to that! Apart from uphill situations or when accelerating, less RPM always means less fuel consumption as long as the engine can still hold the speed without flooring the pedal.

please do not rip sentences out of their natural surroundings :-)

As you see above, I allowed for special situations in which downshifting can result in higher rpms AND lower fuel consumption. But this is never the case when cruising on flat road, you will always have the best fuel efficiency in the highest possible gear there. To get best results uphill, use DWL.

so long,

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