None of our engines look like Maine's. I have been sucking mine through the dipstick tube and you will never get it all out. that is okay because you change oil every 50 hours and the filter the same. The engine will be happy this way!
For most all engines you can buy a sump hose adapter kit which sucks the oil out of the bottom of the pan. Even if you don't, what Bad O said is true. My only caveat would be for those of us that have winters. It would be a good idea to change the oil twice in the fall (flush it) so you know you don't have acids and contaminates sitting in the engine sump.
Another option, to get the rest out, is to use a tin foil baking pan for say lasagna and fill it with bilge pads then stuff it under the engine and pull the drain plug..
It's really not that tough to keep you engine looking that good but you do need to look it over once a week and use a microfiber towel to keep up with any belt dust or oil or salt. I do this when ever I check my fluids and it takes about five extra minutes.
As my dad always said......
"If you don't keep up, you'll never catch up."
The key is the connector between the oil sump drain hose and whatever method you choose to extract the oil. Our hand pump puts it into an old plastic orange juice container. For the M25 engine, open the oil refill cap as well as picking up on the dip stick to break that seal.
