Knocking Lifter

This past few days I have noticed the dreaded top end knock :mad: I went ahead and changed oil and filter today, still the same, noise there until rev it up! I have read a few months ago people praising an additive called blue foam,sea foam...can not remember! :banghead: Any input, guys and gals??

Scuba,
I never used it, but there's some info on the website http://midwayautosupply.com/detailedproductdescription.asp?4456
Part # SEA-SF16 / Sea Foam Auto Marine Motor Treatment
I also see Idaho Jeeper mentioned it in an earlier post on trannys.
Good luck with the lifter.

fresh oil,filter 1/2 qt of CD2 and some marvel mystery oil in tank, did the trick!