"When you get one, you also should consider running Shell's new W100 plus oil which I understand helps reduce fouling and corrosion."
Use Aeroshell 100 if you have a LYCOMING 0-235 Cessna 152.
The TCM 0-200 uses Aeroshell 80 or Phillips XC 20W-50.
All the "plus" in Aeroshell oil is an additive to prevent "dry" starts on engines flown less frequently, where oil would "run off" internal components after sitting a while.
2) The owner said the engine wasn't running as smoothly as the 172SP that he had been using for training, so he spent $700 on a valve lubrication and it's been running much more smoothly since then. I've heard that these valves can be "sticky" sometimes, but is this lubrication procedure normal or is it a cause for concern? Would you expect that issue to be recurring if the lubrication wears/burns off, or would you expect it to be good for a while now that it's done?
$700 for "valve lube"? I have never hear of such a thing, somebody BS'd 700 bucks out of his wallet.
