Bob:
Went to the FAA site and searched for the May Alert AC 43-16. Could find nothing for May 1996, and nothing on Mobil and the
oil problems your are talking about. Might you have the wrong Alert number? Also went to a Mobil Products book, and they have 3
synthetic oils offered to the aviation industry, all are for turbine, or jet engines. The recip engine oils are all mineral, called the Mobil Aero oils, Numbered Series and Banded Series. Two types, a straight mineral
oil and an ashless dispersant
oil. Both have military approval.
Are you sure the Mobil problem oil was a
synthetic for aircraft recip engines?
Jerry