I am assuming the barrel was FREE?
I am no expert here but, the Mobil 1 ATF DOES meet the requirements for Mercon V whereas the Delvac DOES NOT, according to both of the Mobil links that you provide. Others will chime in with more information. And, you may want to think about selling off the barrel of Delvac and buying some more of the proper ATF that you've already been using. And that's kind of a shame as how many people ever come across a barrel of any ATF or oil.
Edited by Char Baby (09/17/17 03:06 AM)
'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'06 Mazda 3i 2.0L
'15 Nissan Altima 2.5 SV