the base mineral oil might not 'wear out' but the additives do, modern lubricants are a complex formulation .....
most suppliers will recommend keeping lubricating oils on the shelf for no more than 12 months, depending on type and storage conditions

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot