At about 100,000 miles my '87 started to have noisy lifters. A
mechanic told me to use GUNK Valve Medic. Now when I change the oil I
put in a bottle. If I am going to let it set for an extended period
of time I put one in before and drive it for a while. Now I rarely
have any noise and when I do another bottle makes it go away. I am
superstitious so I won't tell you how many miles I have on an
original engine. Knocking on wood.

Chuck