Once again, Bill Auberlen made it look easy. The most successful driver in IMSA history controlled the second half of Friday’s Fox Factory 120 at Michelin Raceway Road Atlanta to claim his 20th victory in IMSA Michelin Pilot Challenge competition. Auberlen, who also owns 65 career wins in the IMSA WeatherTech SportsCar Championship, took over the Grand Sport (GS) class-leading No. 95 Turner Motorsport BMW M4 GT4 from Motul Pole Award winner Dillon Machavern just over 40 minutes into the two-hour contest and season finale. The lone full-course caution of the race cut into his lead, but Auberlen was never…