i started my car up and noticed a little white smoke and i took my car to midas and they told me it was burning oil they put in a brand new pcv valve but they told me it could take a couple of days for it to work but in the meantime to just drive it around my car has 184,000 miles and it is a 2003 4cly. they did say that the headgasket was okay, Is they any other thing i could do to stop this smoke that only happens when the car is started up,my car does not over heat or burn extra gas and i just want to get the problem solved without the dealer breaking my pockets,they also said it could be the valve seals but um not shore. Is there anyone out there who could give me some good advice