Just changed the oil for the first time on my 5.7. Wow, what a mess! I have always used on of those oil change tubs that is tapered down toward a hole in the middle. Never had a problem before. Opened up the drain plug on the Tundra and the oil is so thin (5W20) that it did not fall out, it shot out! It hit the downward slope of the change pan and spashed back up toward the right wheel and suspension. Had enough pressure to splah all the way through the wheel and on to the ground on the other side. Next time will use an open bucket sort of affair that has a vertical side that will force the oil down instead of letting it go everywhere else.
Cartridge filter is pretty straightforward. Undo the bottom plug with a 3/8 square drive extension. Push the plastic drain doohickey that comes with the replacement filter up into the bottom of the housing to drain the oil. When you pull the plastic doohickey back out of the bottom, it pulls the bottom "O" ring out with it. You can then remove the housing with a big filter socket. Cartridge comes with two "O" rings and the aforementioned doohickey.
Cartridge filter is pretty straightforward. Undo the bottom plug with a 3/8 square drive extension. Push the plastic drain doohickey that comes with the replacement filter up into the bottom of the housing to drain the oil. When you pull the plastic doohickey back out of the bottom, it pulls the bottom "O" ring out with it. You can then remove the housing with a big filter socket. Cartridge comes with two "O" rings and the aforementioned doohickey.