I am running the Pennzoil 5W-30 Syn blend in mine with a Purone Filter. It is probably overkill for the kind of driving I do but still pretty cheap insurance. Tbh with the numbers Penzoil is putting up with its yellow bottle conventional I might even be switching to that.
http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3242091/PQIA_tests_ten_5W-20s_-_one_ge#Post3242091