Forza Horizon 5 is out now and available on Xbox One, Xbox Series X/S, and PC.
The 1940s Willys jeep exploit saw players get loads of easy cash and rare unlocks by buying the old banger, upgrading it, then gifting it on, getting Skill Points back after getting rid of it, and repeating the whole process to farm unlocks.
This will bring up a race that takes 30 seconds and grants you a fair amount of progress towards skill points per go.
There are other things you can do in order to quickly level yourself up, get cars and flip them on to get Wheelspins.