Earlier quoted context omitted.
Oil is not going away anytime soon. While there will be significantly more electric vehicles on the road in twenty years and gas and diesel vehicles will be much more efficient. There will still be millions and millions of vehicles burning gasoline and diesel. Plus that doesn't even factor in all the uses of oil outside of transportation and energy, for instance pharmaceuticals, plastics, nylon, polyester, asphalt, f…
How much more room for improvement is there in gas and diesel?
engines directly? variable valve timing will be common place and variable compression has debuted. more forced air systems and better injection tuning all present themselves. there is even ongoing work on two strokes and some of them are delivering better performance and emissions than four strokes.