<strong>Yahoo Message Number: 21303</strong>Hi, We have a 2005 CC with a C9 and CC said to use propylene glycol antiferrze but I cant find it, does anyone know where we can get it. <br/>We have also had poor milage, had the engine reflashfiles but all the dealers I have been to all agree it is an air intake problem, one problem is the air to air is to close to the exhaust causing the air...