Thanks for the advice (this is a great forum!). I checked the oil level a couple of days ago. It's due for a change, and at the moment, it's about a quart low, so I assume that rules out overfill (or does it?).

Maybe I should look for the clog that ASaltyDog mentioned.

__________________
2008 ML350
2007 Honda Element
2007 Honda Accord
2009 Honda Civic