The following bar chart serves to go more into depth on the overall premise of fuel efficiency by showing how the number of cylinders in an automobile relates to its overall combined fuel efficiency, taking into account both Average Highway and City MPG.
Average Combined MPG is calculated by taking the average totals of average City and Highway MPG's grouped by number of cylinders and averaging both those metrics to arrive at a combined MPG metric.
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Mouseover the bars to see the exact numerical data values of average City, Highway, and Combined MPG associated with each discrete engine cylinders category.