Hi ShadowMedic, Welcome to CleanMPG. It sounds like you're off to a great start! 28MPG in a V6 Suv is awesome, for sure! For one, the Scangauge is your best friend and worth every penny. It will pay for itself in months, and you'll probably be over 30MPG in a tank or two. Stick to the OEM style dry paper filter, and synthetic 5W-20 if that weight is approved for your engine (check gas cap/owner's manual). DWL is gong to be your best friend
. Check out the CleanMPG Primer if you haven't already, the link is in my signature below. Ask any questions you need, and we'll do our best to help you out.