I bought this simply to add to my collection of castrol stuff. Found it in an old napa store covered in dust. They actually have a bunch of it still. I know castrol says the date is when it was filled, and last a long time on the shelf. However I'm curious about the date on this one. I know this flavor has been discontinued for quite some time now here in the states, and was replaced with castrol gtx full synthetic in the silver bottle. Thanks in advance.