The version 1.11 update seeks to steer the game back on track following a shaky launch that saw developer Polyphony Digital reduce the number of rewards players could earn.
Dozens of changes have been made to Gran Turismo 7 in its first post-launch patch.
Polyphony Digital apologised in March by giving players one million free credits and promising this update in early April.
Polyphony Digital has also “adjusted” the rewards for Arcade and Custom races and raised the maximum cap for earned in-game credits to 100 million.