Forza Motorsport 6: Apex

The plain and simple guide to this is to turn down the drivatar level to New Racer and turn on limit aggression. You can play with what ever assists you want on, you're looking to get an early lead on the driver's and do the remains 4 or 5 laps with them in the dust and you in first place.

You'll get the achievement with just dedication to playing more races and of course, winning 1st place.

To check your progress go to Driver Record in the main menu. Not other tricks here, it's a game of endurance with sticking to the game.