Hi-
It truly is a mystery to me, but my long standing tick-tick- tick of a valve lifter is gone.  The engine is a rebuilt 2.1 with about 25k miles on it.  Been run on Mobil 1 since about 5k.  Has had one noisy lifter since about 10k. Figured I'd be swapping it in the spring.  Saw the Marvel Mystery Oil in a store over the weekend, remembered seeing posts to the list about this stuff and figured (as they say in Brooklyn) "it cain't hoit".  Well, at the end of my first 15 minute drive...silence.  I guess it's oil, it is a mystery, and it sure is marvelous.  Give it a try, it's a cheap experiment.
Gary

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