Talk:Enduro Double Down/Chevrolet Corvette Grand Sport/@comment-28856025-20170509014405

Here's the strategy I used in the Aston Martin One-77 EDD: start doubling from Challenge 3 (Ace Race 1), keep doubling until completion of Challenge 23 (Ace Race 5), and save. This strategy earns me every time and if I do this 7 times, I will have  remaining until I get the car.