Oil changes aren't a race. No need to see how fast you can get it done. I take my time doing mine. Only time Ive done one in 20 minutes was because I was in a rush to get it changed before having to leave on a trip, and I forgot to change it sooner.
Depends on what we start recording at to get that 20 minutes...
I need to
* Get oil, filter, drain pan, oil udder, funnel, shop towels, wrench, and socket (always forget which one) and bring upstairs
* Move truck into position
* Raise truck up to OR2 (even longer if I need to grab a jack for non-air suspension)
* Fumble with getting the right socket to fit, throw pan and towels under truck
* Remove oil plug
* Remove oil fill cap
* Let oil drain
* Replace oil plug
* Loosen oil filer with oil udder and tubing into pan
* Replace pre-oiled filter
* Fill up oil and check level
* Re-fill used oil into 8 1qt containers
* Clean drain pan
* Clean up\throw away garbage
I take around an hour to get it done
If I had a mechanic's garage sure I could do it in 10-20 minutes if i don't have any prep work or cleanup, but majority of people don't.
Obviously these people who have garages and lifts say stupid stuff about how XYZ is easy, but they don't even stop to think about everything they have already paid for to make it fast