Anyone have or know of any recurring problems with the Nissan 2.4L KA24DE engine? Just got one and want to know as much about it as possible, and how best to care for it. It's in a Frontier XE 2WD King Cab with AT. Plan to run full syn for long oci and lots of highway miles. Any major problems or things to look out for? Do's and don'ts? All suggestions welcome!