6k miles Oil analysis of SR20DETs has proven that 3k changes are total overkill and completely unecessary for normal conditions :nod: The oil is still good at 6k miles.
To be honest, unless you are going to be spending large amounts of time on track, nearly every branded fully synth 5W50 or 10W50 is as good as each other. SXOC has done quite wide ranging oil analysis tests (using Ford's testing labs) and proven this.