Just an update to my previous post. Our area has been experiencing some cold weather, (for around here) anywhere from -10 to around 0F at night. Last night it got down to about +5F and when I started this car up this morning I had some lifter tapping again, nowhere as bad as before. After about 3-5 min it subsided, For now I am just going to let the car warm up completely before use. I am also going to try the Kero trick again at oil change. I suspsect I either have some weak lifters or the oil channel is not completly clear yet. Thanks again to jeffcoslacker.