Oil Question

Hello



New to the forum and to Rover ownership.



I have recently bought a 2004 Rover 75CDTi auto, and I'm looking at doing an oil change now my question is I recently found a couple of unopened 4ltr 10W/40 semi-synthetic oil at the back of the garage which must of been there for 6 years? Would this still be ok to use and can I use it in my Rover?



Some additional information the oil grade is ACEA A3,B3,B4 & ADL SL/CF.



Any help / advice greatly appreciated.



Many thanks

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