Found nine cans of the old EOS additive at a rummage sale many years ago. I also bought 75 quarts of SF rated multi grade oil at the same sale. Got a bit of 1970's dust on 'em.
The seller ran a small engine shop for many years.
I have only used one can so far as an assembly lube on a few race engines and have saved the rest for my personal cars.
Most of the oil was appropriated by my sons to use in their cars...without my knowledge I might add.
Most was at least 25 years old...some were in steel cans!
Before we discuss old oil, additives settling and such I can say no ones car blew up...no engine issues at all in their modern rides.
Anyway I am using the EOS in the 318 that has been idle for a few years. Going to lube the cam lines and rockers then fill the pan with my usual Federated ( Amalie) sent synthetic oil.
The EOS contains calcium and/magnesium and zinc.
It was our go to additive at the GM dealers I worked at in the 60's...good stuff.
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