Board Thread:Game Discussion/@comment-30440376-20180821084049/@comment-32019651-20180823201436

The fame payouts for tier 5 are the same as they were for EK 10-lappers and the fame payout for tier 15 is the same as it was for EC 10-lapper, just as we were told they would be.

No, you cannot complete the first 5 tiers with the 2015 cars.