I wrote a poem about my truck,
I don�t want to press my luck,
We know the rhyme that should be struck,
So I�m going to end with orange.

I have read responses saying Heavy Oil is the thing, and Thin Oil is my
friend here.
On the other hand, neil suggested time as a cure.  I can run my truck the
whole day with the lifter banging away.  The next day, quiet as a thing
that�s really quiet when it runs.  The can of additive works for a while,
then I�m back to noise after a month or so.  Does this indicate an oil
change when the lifter starts, then additive, then another oil change?

ed- WAIT! I GOT IT, DOORHINGE!