Sealed tin cans!!!
I can’t say that oil will stay good or go bad over 2 or 3 decades. My thought process goes to how many $$$$ I have invested in the motor that I would pour it into trying to save a few bucks. If it’s still good, then no worries. If it has separated some how!!!! Could be bad.

So, for my Mustang, no. A lawnmower or driver that leaks badly or burns oil, sure. Those already have problems / living on borrowed time. Just my thoughts.

Only oil I ever had go bad was some synthetic stuff that the additives settled out of and would not mix back in. I even talked to the manufacturer about it and they said to throw it away and they sent me a new case. Theat was over one winter of sitting. 

I think the biggest issue is the newer formulations have much better additive packages.

Bearing Bob wrote:

I'd keep one for shelf art, then sell the rest on fleabay.

 

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
              THIS!!
6sal6
You read it here first!!

red351 wrote:

Oil that 50 million yrs old is still good, isn't it

 
Hey Red, 50 million year old oil gets refined before its put in a bottle.

red351 wrote:

Boiled you are right, but 40 more yrs in a sealed bottle is nothing in the time frame.

Very true

MS wrote:

Might be able to buy a new 351 for what you can sell that one metal can of new oil!!!

Or not, but I bet there are collectors out there that want it.

Otherwise, good chain bar lube for your chain saw or bicycle chain. (OK, now time for TKO to explain chain lube has different properties and motor oil is not acceptable substitute).

@#$% MS, we've used near everything for bar and chain lube over the years, used motor oil, gear oil curt with ATF, and DEFINITELY expired oil.  Its got different properties sure, but with the amount we cut the chains wear out from being sharpened repeatedly before anything else happens. The trick is to mix up something that will flow through the oil pump and be just a touch tacky.  I swear, sometimes its like you really don't know me at all

I guess after coming this far on the project, (351w into 67 coupe), it would be penny wise and dollar dumb
to use this oil. I may give to some friends, I know that have oil burners and leakers. Between the rebuild on the
351w,new carb,clutch,exhaust,flywheel,moog lower control arms,spring saddles,shocks,aluminum radiator,
and more, I guess I'll for spring for new oil with additives,for a flat tappet cam. 
THANKS FOR THE INPUT mustang stu