What oil are you running, bud?My 2001 v10 f350 gets oil and filter twice a year since I had an issue with loss of lots of oil a couple years ago. This last fall at 1000 miles but almost a year i changed oil and could not find a new filter in my garage.. so i unscrewed and drained my mobil 1 filter and re-used it.. first time ever I used a filter for two oil changes. I will change oil and filter again in the spring... and it will be fine.