Oil Filter Change

[Sven]

Nope, the oil in the cooler won't drain out. There's a check valve in the line that prevents the oil from draining back when the motor shuts down. If it didn't have that, it would have to have a bigger sump for all that oil to drain into -  and the engine would run without oil longer during startups while the oil pump filled the cooler & lines.

Well, something learned today!  Now I can goof off for the rest of the day.  Strange that this isn't addressed as a maintenance item.

[H2RICK]

I always change the filter every time though. I don't want to leave a filter full of dirty oil in the engine and the cost of a new filter is cheap insurance, IMHO.

+1
Repop filters are cheap enough and the filter paper mostly comes from one or two manufacturers, no matter whose name is on the filter.......so why not change it EVERY time ??!!??
As Red says, it's cheap insurance, and, on a cost basis, you can buy a LOT of filters for the price of an engine overhaul.....
right ??