Mike,
The C9 is designed to run hot to help meet emissions requirements. Thus one has to watch it when climbing hills, etc. The side radiator has a wax valve that will control fan speed based on engine temperature. When climbing hills, you don't want to lug the engine. Additionally you don't want to run the RPMs any higher than needed as all that does is generate more heat with no benefit. When climbing grades, take it out of cruise control. Target your RPM for max torque. Specs show that max torque for a C9 is about 1500 RPM. I find that I get the best results running 1700-1800 RPM when climbing. Watch your engine temp on the Aladdin. It will normally increase a few degrees as you start to climb. If it continues to increase and RPM drops, downshift to keep RPMs in the 1700-1800 range. Don't worry about speed. Drive to manage RPM and temperature.
Steve