1996 Oldsmobile Delta 88 value noise due to no oil

It sounds as if you have a bad lifter, it doesn'tpump up when cold then does when warm. You might check for a loose rocker arm or a bent pushrod. Other than that he thing is to replace the lifter. Which it depends on which engine you have. You might try some chemical ebefore replacing it. Look for one that specifically cleans lifters and it won't fix it right away.