type44T lifter tap

[JordanVw at aol.com]

its gotten cold here in the NE again (mid 30's). anyway this morning i 
started my 5kT, and the lifter(s) were tapping loudly until after about 5-10 
mins of driving did they quiet down.  
and ideas or suggestions?  the car doesnt burn any oil.  and just has 114k 
mi. 
any oil additive that quiets noisy lifters?   im currently running Mobil 1 
20-50 synthetic in there, with a OEM filter. 

chris
'86 5kT