Would like everyone's recommendations on engine oil viscosity and brand to use. Have an 05 rocket III with approx. 350 miles on complete build. Have always used Mobil 1 Racing 4T 10w-40 and usually a Wix filter. I have read several articles about using heaver viscosity oils and different filters. Plan on changing oil and filter around 400 miles. Might use the Mobil again this time and change again before going to a tuner. Ride intermediately until spring. Would appreciate your thoughts and recommendations. Thanks in advance Gerald