Board Thread:General Discussion/@comment-10090661-20141028101100/@comment-137.205.244.182-20151123163154

I've been using Silver Lightning Season 9 / Mastery 14 to farm coins to date - these work well

Sounds like the best is the Mclaren 675LT Mastery 15 followed by the Lykan Hypersport Mastery 15 but these need 3,4mill coins to upgrade +tuning / 967k coins to upgrade + tuning, and need 16 V8 engines / 16 V6 engines to tune.

The most cost effective car to buy, upgrade and farm with is the Ferrari F12berlinetta which only needs 489k to buy and upgrade and tuning needs no engine cards. The only downside of this is that you'd be farming San Diego Harbor - Flawless - which means a % fail rate perhaps.