If an engine required something other than standard, such as synthetic oil or diesel engine oil, it would be charged out as such by GM part number on the invoice. Such oils were stocked in quart plastic containers on the shelves and were not in the bulk oil tank. Nice to know the USAF had an adaptable system in the '70's that we didn't have in the '90's or oughts'. Perhaps you could take that up with Reynolds and Reynolds who provided our system. To imply poor customer service and even dishonesty due to a computer-generated obsolete description is a leap to a most illogical conclusion. None of this would occur in the'70's before computers when repair tickets and invoices were handwritten.
2013 Crystal Red Premium, black leather trim, both packages, Bose speakers, navigation.