- Aug 7, 2012
- 15
So a buddy of mine just bought a house that came with a tool shed. Per the terms of the sale, the contents of the shed came with the house. Most of what we found was old tools and a lot of trash. But we did come along a case of synthetic blend Castrol motor oil (10w30). It's hard to say how old it is, but none of the bottles have been opened. This leads to the obvious question ... is this oil still good? Would anyone here use it not knowing it's age, and could it do any damage to my Envoy if I did? I would appreciate any insight you may have.