Join Date: Jul 2006
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It really depends on what type of driving you intend to cover, whilst filling up.
Casting your minds back to your schooldays - you'll recall talk about inertia, momentum, etc. in essence, the more mass there is to accelerate (and decelerate as well, remember), then the greater the force which is required to change velocity.
However, if the vehicle (or object) is accelerated to a constant velocity (on a level plane), then the force which is applied to maintain that speed is equal to the friction the object is experiencing (tyre & air resistance).
Quite a long-winded way to say that on the motorway - filling to the max is best (you also save on a wasteful stop, and paying higher prices), whereas for town driving, keeping it between a 1/4 and 1/2 is probably best.
Science lesson over for today - hope you were taking notes!
This job should never be complete - the day I think I've done it all, is the day I resign.
Currently in VelSatisfied's garage:
2005 FIAT Ducato 2.8JTD LWB Gran Volume, 2000 Kawasaki ZZR 1100 D7 'fullpower' in black + full GIVI & KAPPA luggage, 2007 MB R-Class 320 CDi Sport LWB uprated by Brabus to 300Bhp don't know if there's a 155mph limiter - will be fun finding out! 2004 Mercedes Vaneo 1.7 CDi Ambiente 7-seater