I need an oil filter that will take me for at least 15,000 miles or 1 year. I can't change it before then because I'll be in a very remote area. So getting the right filter is essential for my wellbeing as well as my vehicles. Is there any thoughts as to if Amsoil Filters are worth the money? Should I get a filter that can push 25,000 miles vs. 15,000 miles? If I use regular oil vs synthetic oil what am I doing to my longevity ratio.