Because they have never driven a fast car. A civic with crappy exhaust and an air intake is still a slow car. Im sick of racing these fools and wasting my gas for no reason. Are you one of these guys? have you ever driven a real car? All show and no go?
when you start the car the ecu will make the engine rev a bit higher to get the oil flowing, then it drops down to normal levels. Should be ok, but get it looked at.