I've found that if I leave my climate control on from the night before and let it kick on when the engine reaches 100*F or whatever temp it lets the heat kick on, it takes substantially longer for the car to warm up to operating temp, like an extra five or ten minutes or so. I live about 1.5 miles from my school and if I leave the heat off, it'll get to around 65-70*F in the five minutes it takes to go that 1.5 miles. With the heat kicking on when the engine temp sensor allows it to, it won't make it past the 60*C mark. Try leaving the heat off for a few minutes to allow the engine to build up some heat and see if that makes a difference. Of course, this is with a 617. Your experience may differ.
