which motor will give the most run time?

[auto2]

mentioned on another forum ( by someone i trust) was that the hacker motor will give longer run time than a NEU cause it draws less watts .

like to start a discussion on this topic. in 1/8 buggy you only need so much power. are the neu motors im using overpowered ? 1512 1.5y? (5s)would another motor still have adaquate power but add to my run time?