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Depends on the bus and what kind of route it runs. Keep in mind that some city buses are entirely electric. A bus driving long distances on the Interstate will likely fare better in mileage than a city bus (one that runs diesel fuel), on account of it not having the stop-and-go traffic. You take a Greyhound bus, tour bus, etc., running down the Interstate, you're probably looking at 7 - 10 miles per gallon... they have engines built for tractor-trailers, but with considerably less weight. City buses... it's really difficult to say, as there are a lot of variables between different cities, plus the fuel type they use.. some cities have made it a point to run straight biodiesel, which, while appealing to the flower children, also produces 12 - 15% less BTU output than ULSD, and that'll result in more fuel being used.

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11y ago

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