had two oil changes @ 2 different sprawlmarts. wouldn't use their auto dept for an oil change in my push mower. incompetence galore. saw one guy try to torque a fill plug on with an impact. another place i told to use mob 1 10-30 in my jeep, saw the guy try to put the ultra cheap axx sprawlmart oil in there. no thanks, would rather drag my junk over hot coals and then have a russian ballet troupe dance on it.
your correct about the 5 qt jugs. 19.96$ most of the time iirc, though ive never seen 0w-20. but the local place to me has 5-20 most of the time. but that's a debatable oil viscosity argument that i wont tread on lol.
cheers