This summer I plan on doing lots of towing with my 2012 V6 Nissan Pathfinder so I am going to run my Mobil 1 for 6,000 miles and change it out and run another 6,000 miles. Can I just leave the Fram Ultra on for both OCI? A total of 12,000 miles. I am a little worried as the filter on this truck is small I don't recall the exact model Ultra off hand but it's small. The truck has 27,000 miles and the motor should be clean running M1 with my OCI between 6-7,500 miles.