While is the best for quick edits, other tools exist:

(also known as the Grenadier Editor ) is a third-party save-game modification tool for Gran Turismo 5 (PS3). Unlike in-game currency grinds or the unpredictable Used Car Dealership, this editor gives you direct, database-level access to your GT5.SFO and GT5.BIN save files.

– The essential tool for Gran Turismo 5 enthusiasts. 🛠️