Talk:Mazda RX-8 Special Edition/@comment-33956852-20180719142837/@comment-36014998-20180719155722

After Test 1: upgrade Nitro one level. After Test 2: use the free upgrade to reach Nitro Level 2. After Test 8 (Lab 2): use the free upgrade to reach Top Speed Level 3. After Test 18 (Lab 3): choice of Nitro Level 4 or Top Speed Level 5. Regular prices are 1025 tokens for N4 and 399k credits for TS5. For me, I can get 400k credits more easily than 1000 tokens, so I’m going with N4. NOTE: THERE ARE ONLY 3 FREE UPGRADES, NOT 4.