User blog comment:RR3 Michael P/My car garage, upgrades and progress though RR3/@comment-27630866-20160409071018/@comment-27962837-20160413145050

Keep an Elimination/Endurance unwon, because after you win the race (at least for me), you won't be able to slow down bots anymore.

And personally, I didn't like the Enzo - it skids so much - so it's not the easiest series, but solvable even with a lower PR.