The label on the can said "Classic." I'll have to check for the code but won't be able to do that till Monday of next week.
Yes, the oil was pretty thick and very black, but it wasn't "gritty" like I expected, (I've changed oil on some beaters in the past where there were chunks of carbon in both the oil and filter).
As far as top up oil is concerned, if you look at the pic of the Luv Machine fuel tank, next to the drivers seat in the pic is part of a barrel I cut and keep in the cab as a "holder" of sorts. There's a white jug filled with used oil I drained from my 1950 Case tractor. It was drained in July of 2013, (note date written on jug). Currently, that is my top up oil.