What is the shelf life of unopened hydraulic oil? Found an unopened 5 Gal. pail in the barn cleanout project. dont know how old it is, maybe 10 years or so. Also found some unopened gear oil.
Originally posted by Chipmaker
It was no beg deal to order oil and other lubes when in the miltary and windup getting the spec'd fluid with a manugfacturing date of 10 or more years old. We even wound up with fluids that dated Viet Nam era during the early 90's. A check of the shelf life and most showed a shelf life date of unlimited as long as can or container was unopened.
My friends father-inlaw has a shed full of all kinds of motor oils most still packaged in the old cardboard foil lined quart cans requiring one of those hard to find pour spouts. Some of it is even multi-vis but the majority of it is straight weight. He uses it all the time. This fellow has more oil than some distributors do. Don't ask me how he acquired it all but he is well known as a pack rat and hunter of bargains so he has been collecting it all for most of his life. A lot of the oil is "Cities Service and Sinclair with the old flying winged Red Horse on them (now Citgo brand), so that shows you just how old this stuff is. Also has a few cartons of Arco branded oils / greases fluids .(Atlantic Richfield)
I certainly would not be afraid to use it, and if it appears to be clean and the container was still sealed it should be serviceable.