60 months is the standard for most top shelf oils. Synthetics can go longer.
I'd buy him a Schlitz or a Hamm's (one that has been in storage for 3+ years), and use the oil.what kind of beer?
Dang, beat me to it.Oil can stay in the ground for millions & millions of years, but goes bad in a sealed container in the garage in 5 yrs? Lots of old oil is recycled, which just means super cleaned, maybe refined again and new additive packages added.