It is possible to go far in the game without spending a penny but you have to be really patient. Youll have to redo the same races hundreds of times before getting enough $ to be able to buy next levels cars... I remove a 2nd star because I stopped playing this game, as I needed a Legendary V8 to improve my best car, and in the past 6 months playing every day, I never got this part. Very frustrating.
Lapieuvrechess about Asphalt 8: Airborne, v2.4.0