Looking at your oil drain "pan" jogged a circuit in my head.
Maybe the reason my oil drain pan works so well with my G5 is it's a real "pan".
Rather than being a sealed container with special "oil in" and "oil out" caps, mine looks like a plastic version of a real pan that you could use to boil soup in on a stove. (I also have a version that is actually made out of real metal.)
Now, as you all know, I would never do anything to damage the environment.
I can say the termites don't like the ground around my wooden fence posts though.
If someone doesn't have any wooden fence posts to protect they could still use my oil draining pan along with a large funnel to get the used oil back into the plastic bottles to take to the auto parts store where they could donate it to the stores 'used oil' container.