I run mine on just about all the time. Reading the owners manual, the auto mode was to be used in conjunction with the cruise control. I used the auto mode when coming down from Eisenhauer Tunnel into Silverthorn. Set the cruise at 55mph and double tapped the exhaust brake to auto. Never touched the brakes. Same coming down Vail Pass. It is sweet!
2014 Dodge 3500HD Cummins Crew Cab, Dually, Aisin, 3.73, 4x4, Long bed, Curt Q20. Appliance White!
2015 Jayco Eagle 339 FLQS