One of the main benefits of electrifying transportation is lower energy costs compared to fuel costs. The cost savings potential varies between vehicle classes. According to Argonne National Laboratory's report Adoption of Plug-in Electric Vehicles: Local Fuel Use and Greenhouse Gas Emissions Reductions Across the U.S., the larger the vehicle, usually the greater the potential for fuel cost savings. That's because larger vehicles consume more fuel than smaller vehicles.
If the vehicles were replaced by a plug-in hybrid for only a partial fuel cost reduction, then the cost-saving potential would be substantially lower. Fuel Savings Potential when Switching from Conventional to Plug-In Electric Vehicles Interestingly, ordinary cars have almost the same full cost-saving potential of $0.10 per mile as vans and SUVs. The lowest savings were estimated for crossover utility vehicles and sports cars.