Cold air intake, since its under warranty, a Mazdaspeed Intake is the way to go. A Mazdaspeed flywheel since its under warranty wouldn't hurt, replace your plugs wires and ignition coils (Colonial Mazda says about every 15K) and carry a quart of oil in your trunk. I've stuck with regular 5w20 non synthetic oil and I haven't had an issue so I continue to use it. Premium fuel, and check your oil once every 2 or 3 fill ups. I burn through a quart every 2500-3000 miles and thats when I usually change my oil anyway. Ive had no issues at all.