Quote Originally Posted by James View Post
One thing I forgot, the Valley Detroit guy did stress that you need to follow the manual on changing the oil if you're going to let the engine sit for awhile.

Seems you want to drain the old oil out when the engine is cold to make sure you get all of the condensation that is in the old oil, fill with new oil and only run the engine for a couple of minutes with the new oil so it lubricates everything but doesn't get hot enough to cause condensation when you shut down.

There is no condensation in oil, any water would float on top but that would be a sign of a major problem...head gasket and so on. The moisture that is a by product of combustion will condense on the valve cover, fill tubes and other hidden places, and may eventuallly cause rust.... the chances of it dripping back onto the oil...slim to none! Changing the oil when cold would only aggravate the problem as the hot oil has the ability of carrying moisture out with it when it drains and venting thru the fill.

Should this really be a concern why not take the oil filler cap off the engine when you shut it down....it allows the system to vent and the moisture will evaporate. Really want to get down to the nitty gritty, buy a Tanis System for around 700.00 http://www.aircraftspruce.com/catalo...Dehydrator.php