I was contemplating my 1st oil & filter change around 500 miles and using Amsoil Signature Series 0w20 for the life of the engine. Going forward I would use the OLM down to 15-20%. Not sure if that factory fill oil has to stay in there longer. I would think the engine if fully seated by 500 miles. I thought I'd get some opinions. Also, Amsoil doesn't show one of their brand oil filter for this engine so I'd have to buy a different brand. Would you stick with the OEM Honda filter or use something like a FRAM Ultra, Mobil 1 or ? I appreciate your input.