When I started reading your post I thought this is sounding good. I cracked up when I got to the end of it, Thank's
I don't change the oil on my Porsche any more, but I don't put a lot of miles on it, so to pay to have it done just makes sense to me.
I'm a Veteran though, have done lots, even on big diesels. Try 11 gallons coming at you, but even with that motor I just pay a service to come out now ( 150.00 with all the filters ) With that much used oil you have to keep it in 55 gallon drums and have a service pick it up.
Cheers and good luck when you open the door