UPDATE
I have complete my first oil change on the 4L v6.
Steps:
1) run errands, warm up oil
2) parked on level surface, inserted small diameter tube into dipstick. Tube seemed short, so I put the evacuator up on a stool. (so the top of the unit was just above the top of the tire)
3) started pumping (realized later I needed to open the oil fill spout for better speed)
4) changed the filter (wow was it tight). Dropped the rubber cap (found it much later) that prevents the catch pan from spilling oil.
5) inspected results from evacuator. Not satisfied, so I tried a few more things, like holding it as close as possible etc. tube (5 feet) still seemed short.
6) removed the oil drain pan bolt. I did not have to remove the skid plate at all, there is a good-sized oval access area to get at the oil pan. Am I missing a part here? In any case, more oil definately came out. Just studying the design, the oil pan is absolutely the lowest part of the engine. I doubt that the dipstick even reaches into it. It wasn't much more oil, but it definately wasn't totally empty.
7) I replaced 5.1L of Mobile 1 Synthetic (4.4L jug was $32Cdn on sale (regular $38), the 1L was $8 and change)
8) I was able to put all 'old' oil into that same 4.4L container for disposal, it was near the top, therefore more then 4.4L. Not sure what to make of this.
Fiddling around time:
Just holding the evacuator tube, I tried cramming it into the engine a few times, checking to see if I could see it around the drain pan. I tried 3 times, and was not able to see the tube from the bottom, but this was hardly conclusive. This evacuator tube only goes so far, I don't think it finds its way to the drain hole area. I'd like to see an engine diagram to 'predict' where it ends up by looking at the dipstick-drain hole relation.
Comments:
1)
http://www.toyota120.com/html/v6_quick_clean_oil_change.html
Looking at the picture of the evacuator we see an arrow indicating 4.5L extracted. I feel like I got roughly the same result, (but a longer tube would have made it easier). If 4.5L is accurate, then the evacuator must be comming up short.
2)
I'm not overly worried about sludge not being gathered by the evacuator, I always thought oil should suspend the contaminants anyway.
3)
I'm thinking the evac gets nearly everything. If that is worth it's simplicity (assuming a longer tube) then I think I will continue with this method - especially for winter where I don't want to lie on the ground. I'd also like to speak to a cousin who is a mechanic and get his take on evacs. On the other hand, it really isn't *that* hard to get underneath and undo the drain plug.
J