I vote KISS and ignore. Are you going to run the oil until it's chunky, or until it still has life left but it feels like time? If you're changing with "lots" of life left, then a little bit left behind won't hurt anything. There's always some left behind inside the engine.
Originally Posted by zorobabel
You could install a 3 way fitting with a removable plug at a low point in the oil hose. Or attach a vacuum pump, or regular pump to the filter mount to clear the oil hoses. Or if you could possibly insert a small hose in the oil hose, vacuum the oil out. The KISS option is to just leave the oil in the hose alone.
Originally Posted by Avery4
Unrelated question- When I do an oil change, what would you do about the oil in the cooler and in the lines? I'm thinking I will fire the engine for a second with the filter off after I change the oil before screwing the new filter on to flush any old oil out of the cooler and lines. I may even try modifying an old filter to screw on before firing it to direct the oil into my drain bucket instead of all over my garage floor. Unless you have a better idea?