I have an '04 Honda Pilot with 78K miles on it, lately one of the valve lifters has been making tapping noises. This occurs frequently but not constantly, I was wondering about adding Marvel Mystery Oil at the next oil change. Has this worked to silence noisy lifter for you? If not what would you recommend?

I used to put that in my diesel fuel tank occasionally but never for noisy valves.

Try this stuff

I use Lucas products and never had an issue.

I'm not real familiar with Honda engines but last I checked they are not a hydraulic lifter setup.

They are solid lifter so clearance needs to be checked and adjusted. Oil additives etc won't do a thing for valves that are out of adjustment.

Check your manual to see if it's recommended at 50K or 100K miles or whatever.

A little valve noise isn't usually a problem. The saying goes "a tappy valve is a happy valve".

Correct. But, Marvel IS the best for sticky lifters. It will unstick them every time. It usually takes about 5000 miles but they will yield to Marvel.

I won't disagree with you.

In my experience though, lifters that are stuck are hydraulic, not solid.

Kreen from Kano Labs gets great reviews as well.

Seafoam ?

1 oz per qt of oil......

run 300 miles prior to oil change....

I'm gonna try it next change...

They even have 710 caps!

http://www.kanolabs.com/engCle.html

This....Seafoam rocks.

in my old accord with 250k miles my mechanic has me put marvel in the oil and in the fuel.