What is, in your opinion, the best 4cylinder engine ever 2.0L or under? Non-turbo no supercharger, just N/A motor. By best i mean whatever you think, longest lasting, best performance, most rewarding to build, most innovative, whatever you think "best" should mean. For me the best would be also in my favorite daily driver i've ever owned which was a Civic CRX with a D16. Amazing gas milage, lasted forever (almost 300k miles) until the car was destroyed by some idiot in a SUV rear ending me.