A key question here is will the additional cost of any aero luggage box / trailer / bag be paid off against the additional fuel you will burn otherwise ?
If you have to carry stuff a lot then maybe a larger car may be a better long term bet as you would get the benefit of built in aero.
If not then just take the temporary hit for when you do, or go slower to compensate ?
I'm hitting this question now - my car usually has me and sometimes one other (Arragonis Jnr) but I sometimes want to carry bikes or other outdoor stuff. So maybe a van would be better.
Just a thought.
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[I]So long and thanks for all the fish.[/I]
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