I have recently changed the oil with syntec blend motor oil, flushed and relpaced the coolant, installed an intake system, and did an ignition tune up (plugs, wires, etc.). I seem to be losing gas milage. Anyone have any idea's on why this might be? I am getting ready to put a new head gasket in either today or tomorrow (depending on work schedule). Any idea's would be greatly appreciated on my end. Thanks.

neon.ace