I'm at level 84, and finishing the Accolade Open and V10 Open races. IOS 7, RR3 current version. Own all cars, all fully upgraded.

The Endurance races are giving me fits. A few hints would help. At these speeds, dodging those hindrance cars is tricky, the seem to love corners. I assume if I bump one, it slows my time down. Same with taking the outside corner to pass them. 

Any tips? Also, which is the best car to drive in each?

Thanks.