Board Thread:Game Discussion/@comment-76.115.82.181-20180106000720/@comment-33870577-20180107123326

If you get the Mustang GT Premium for 90 GC you will end up with +91 GC earnings (+1 GC net) from 100% finishing two series (Performance Rumble  and  V8 Muscle Hustle) where other car are all R$ cars.

If you get it via its usual 20% showcase your net earnings is -9 GC after completing those two series.