02-28-2012, 03:32 PM
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#2 (permalink)
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Master EcoModder
Join Date: Dec 2011
Location: New Zealand
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One liter of water weights almost exactly 1kg, and while 70 kilos isn't negligible, I'd say it's not terribly significant in a car the size of yours. You could probably net slightly better city numbers doing the half tank thing... but I fill mine all the way up for convenience's sake.
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