I have done both ways over the years but I always liked putting a drain pan
under the oil pan and let it drain overnight.


"William Andersen" wrote in message
...
Is it necessary to run the engine to get the oil warm before draining it?
By the time I get to change my oil, the boat will have been sitting for
over
a month. It seems to me that all of the oil will be in the sump and should
drain right out. If I run the engine to get the oil warm, the oil will
have
to drain back down to the sump again before it can be drained.