1. 2015 Volkswagen Passat TDI: 2.0-Liter Diesel, Six-Speed Manual – 31/43/35
And thar’ she blows! The most fuel-efficient non-electrified midsize sedan you can spend your hard-earned Benjamins on is a people’s car. If the Volkswagen Passat TDI were a person it’d probably steal ketchup packets from restaurants, reuse paper towels and purchase generic versions of generic-brand products, it’s that miserly.
When equipped with a six-speed manual gearbox the Passat stickers at 31 miles per gallon around town and 43 on the interstate. Combined it clocks in at a whopping 35 MPG! Its 2.0-liter compression-ignition engine cuts a check for 140 hp and 236 lb-ft of torque.
Models equipped with a six-gear automatic transmission are slightly less efficient but still a lot more miserly than some of the other vehicles on this list. They sticker at 30 MPG city, 40 highway and 34 combined.