Not to mention that no two cars are maintained the same, and thus, no two cars operate the same. One car will always use more fuel than another. The idea is to get within a range of fuel economy, whether you're slightly over, slightly under, or exact with someone else.
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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