Wife has a big 1000cc SXS. Pavement use only. Always gets up to full temp (fan runs) on every ride. The oil that is in it is syn of the proper grade. I changed it around 14 months and 250 miles ago but did NOT change the oil filter since it only had 500 miles on the oil and filter at the time at the time. I have health problems and changing the internally located filter is a bit of a pain. I need a complete shoulder replacement. Question: Filter has less than 900 miles on it and vehicle has had 2 syn oil changes since it was installed. Should I go another year and a few hundred more miles on it and change it next year?