I am strongly considering changing to AMSOIL HDD 5w30. Would you: run it for 15000 with an AMSOIL EaO filter or use a pure one and change the filter at 10000 miles and oil at 20000. or will the pure one last to 15000? Open to suggestions. Either way i would do a uoa at 10000 just to make sure everything is peachy. edit: Guess I should add driving conditions: 50 miles each way to school 90% highway/10% city with the potential to deal with the infamous I-95/I-695 drive time traffic. and its a 2004 Dodge Neon 2.0L.