User blog comment:Transentience/Farming Efficiency Part 2/@comment-27393704-20150511140659

So I think this is in a nutshell-

Tokens cars may be a good alternative, and in some occasion it can be superior for farming

Make sure you pick a fast car(Pagani Huayra or higher ranked car) and short track to minimize time(Dubai, San Diego Harbor Rev, London Eye recommended)

Newer cars are recommended despite their upgrade prices because of higher payout

Find the wiki and make sure your car's worth it for farming(so you should not max a mini because it's cps is almost 30 but should rather pick scion whose cp is nearing 50)