Chevy Lumina 1997 3.1L - makes this noise on first start up of the day or when the engine is cool. I've been told this is the lifters and I should do an oil change to clean out any build up inside. I currently use 10W-30 oil. I would appreciate your thoughts on what the sound may be.

http://www.youtube.com/watch?v=ZHvpoAjcu6w