ok wow...I have had a pinging issue but today it wasn't pinging...well I see some ricer and he is driving all mad and ricer like and I can't help but show him who is boss so I pull it out of gear into neutral and rev the engine and I hear what sounds like pinging (thought engine only pinged under heavy load i.e. heavy acceleration and up hills) then I begin pushing the car like mad and accelerating hard and I watch the temperature gauge rise streadily until it is in between the r and the m I then upshift and cruise and it goes back down to where it normally runs (the very beginning of the N which seems kinda cold to me) I then downshift and stomp on it to see if it will do it again and sure enough the temp rises steadily...wtf? I checked the coolant and that is good, fan was operating although I do not know whether the fan clutch was working I didn't check, and oil was good except it was a brownish color almost a muddy brown but there was no bubbles and no foam and no smoke in the exhaust. It has been about 2500 miles since my last oil change so I kinda expected the oil to be black...please say I don't have a bad head gasket please!!! money is a serious issue for the next month or so...