I managed the maintenance department for a large web and sheetfed printer for 12 years. On the web side it was Heidelber/Harris M1000 and Komori System 38 presses. Sheetfed presses were Heidelberg Speedmasters and MAN Roland R700 series. We were a Mobil house. In the oil room we had MobilGear SHC 627, 629, and 630 oil, alongvwith a Mobil Vactra #2 and various DTE oils for balers and flat cutters.
I know the M1000s were SHC630. I believe the sheetfeds were 627 and 629 depending on manufacturer. Anytime we'd get new equipment I'd give the OEM oil name and specs to my Mobil rep and they would cross reference to a Mobil product.
Although our SHC oils had similar numbers, they were not interchangeable. One Sunday night the press crew was doing a full press oil change on our six unit M1000. The pressrooom forgot to order SHC630, so the press helper saw the 629 and thought, 629, 630 they got to be almost the same and filled all six print units, 38 gallons each unit 629. We had to drain, flush and refill all units with 630. Both oils ran about $15/gallon! That was a $7000 mistake. The oil room was locked after that incident.
As far as food grade greases, contact any of your local printing suppliers (Prisco, etc.). They have multiple food grade options for delivery chains and such.
CB