The iconic two-seat Porsche 911 Carrera reaches 60 mph in just 3.4 seconds and tops out at 182 mph. Ford's brawny F-450 pickup tows cargo weighing as much as 20 tons. The two vehicles couldn't be more different, and yet both may end up keeping their internal combustion engines as the industry pivots to electrification — if refiners can perfect a new carbon neutral fuel.