With variable valve timing, there are a lot of possibilities.

And even more exciting, I think Porsche is working on electronically positioned valve. That would allow dynamic selection of valve opening and closing.

 

That is the holy grail for ICEs! Current variable valve timing implementations just retard or advance the cam a few degrees. Being able to control the valves electronically would allow elimination of the throttle butterfly. Cost and reliability are holding it back.

 

I drive a lot due to my job, I was getting over 40 miles per gallon on my 2020 Optima hybrid on factory NGK, then I replaced them at 80k miles with E3 a while ago, and the E3 decreased my mpg to 28 miles per gallon, so definitely I do NOT recommend E3 for hybrid vehicles.

 

You are responding to a 14.5 year old post.