What does the chart on the Mileage screen show?

Open the Mileage screen and choose Week, Month, or Year. The chart shows how far you drove each day, or each month of the service year (September through August). When more than one car has trips in that period, each bar is split by car, using the colors next to each car's total. Tap a bar to open that day or month and see its trips. The Day view has no chart, and a period without trips shows none. Bars show distance, not estimated cost.