Injection oil, does it "expire"?

[Heypal]

So I picked up a super clean 1994 Jag. I am installing new fuel lines, filter, etc. The previous owner said the sled has not run since the late 90's (Not due to damage, just lack of use). The oil tank is full to the brim. Should I drain that oil due to its age, or is it good to go even after 20 years!?

 

[Sage Crusher]

The oil may have separation after all that time.
For the price and time to just pull the oil out AND replace the inline filter- will award you a HUGE piece of mind as that is the blood of your engine..