Ok, so I have a 2007 colorado w/ the new 2.9 4cyl, pretty peppy lil bastid. So im gonna be doing a 4k OCI, prefer dino since the oci is short but im open to extending it some w/ a syn. Want good protection because i drive it hard. I live in florida so its hot here mild winters 5w-30 is what warranty calls for. so shoot me some of your knowlege btw i couldnt find any UOA`s for the engine.