9 months, 3,000 miles. My posted UOA showed NO water dilution. Condensation only has two potential routes into the sump of an idle engine: intake tract or exhaust tract. In either case moisture would have to traverse past the piston rings, which make a pretty good seal against the cylinder bores at normal atmospheric pressure, or the PCV valve, which itself is spring-loaded in its closed configuration unless the engine is running. Water is a natural byproduct of hydrocarbon combustion. If there's water present in a UOA report, it's from accumultated blowby past the rings because the engine was not always warmed sufficiently to evaporate it off and blow it out the exhaust pipe during operation.