Today we test 4 different car engines to compare their fuel efficiency. We start by topping off the cars then running them for two hours. Then we compare how much fuel was used by each car during that period.

Cars:
2012 Mazda 3 Hatchback
2008 Ford F150 XL Triton
2019 Subaru Outback XT
2019 Ford Mustang Ecoboost

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