Whatever !!!!
I use 17 ft/lbs - because this bolt is the same (sans magnet) as the rear end drain plug that is listed at 17. I personally believe the spec writer mis-typed the metric spec from 22 to 42 (17 ft/lb to 31 ft/lbs) on the engine drain plug.
My '00 Corvette has a VERY expensive aluminum oil pan. I always use a torque wrench on it.
I read all the old posts shortly after joining this forum and before I did my first oil change. My plug was way tight, so much that my 3/8 drive 6" long ratchet would not move it (with 1 hand-too short for 2!). So I had to use my 18" torque wrench to remove it, but couldn't read the results. Then I retighten the drain plug with the same 6" ratchet, then checked that torque. It was 20 ft/lbs, close enough.
Using the 'seat-of-your-pants' arm as a torque wrench on aluminum is a bad idea. Some of us have bad hands/fingers and whimpy arms, some have Mr. Atlas arms & hands.
