805-239-3673 The Ford C-MAX Energi plug-in hybrid model has the best combined MPGe in its class, with an EPA-estimated 108 city92 hwy100 combined MPGe. Both C-MAX Hybrid and C-MAX Energi have an advanced powertrain which includes a 2.0L I-4 Atkinson-cycle gasoline engine with an electric motor to generate 188 total system horsepower, delivering the responsive power you want when you need it.