Hybrid

Based on what I know, EV (Electronic Vehicle) with the highest energy conversion rate, is the most energy saving hybrid. Simply because I am a Californian, and our electricity are mostly generated by diesel generators from power plants.

That's why I favor diesel hybrid, basically a EV with a diesel generator, for distance and speed of travel, if I must choose a hybrid vehicle. More to that, diesel engine is also an internal combustion engine like gasoline engine, gasoline engine tend to the robustness of fuel while diesel engine is more about the burning of fuel, generally speaking.

By the way, high fructose corn syrup is one of America's most exported goods with canola oil on the side. And engine oil disposal is such a hassle, while synthetic engine oil are not very environmentally friendly, bio engine oil could be a solution like petroleum based skin lotion.

To myself, a car is what I use to travel, fuel is what the car eats and I am a human being. There were farmers settled over a piece of cursed land with underground dark water that cannot grow food for themselves.