The Crew

Reaching level 50 will not take very long, roughly 12-15hrs if you’re mostly playing the story missions with some side activities. XP is awarded by virtually anything you do in the game. Playing story mission will level you up the fastest, but playing PvP events, faction missions, skill games, visiting landmarks, hacking data stations and discovering wrecked parts will all go towards levelling up. A perk is also available to you by Zoe called Missionary which will ultimately give you a 10% bonus to all story mission earnings in the form of bucks and XP.

Even easier and quite faster you get there with repeating a skill challenge over and over again without upgrading the car. I used the skill challenge 19 near the pit mines in the east.

With every jump which takes about 10-15sec each trial you earn between 300 and 330 xp. I started with level 10 where I got my first dirt car and never upgraded it anymore. Since you done a few jumps and got all versions of silver and gold parts you can turn them into bucks.

Later on you can switch to a more challenging jump skill to earn more xp. I used Skill 37 in the southwest with at least 800xp per jump. But there are even some with 1000xp, just be sure you get at least the bronze medal each time.