Okay one more twist, for vehicles that see the extremes of BOTH hot weather and cold weather, is it better to do just the oil or the oil and the timing, OR is it actually better to have a summer clutch and a winter clutch. I definitely do not want to be running around all winter with an engine that cannot come to the proper operating temperature. I know we are all focussed on this for this summer time spell but what happens when the temps are zero or below??? Thanks. 
