I've been using bosch filters and Mobil 1 for a few years and haven't had any issues. Then again that's been in a Mazda 3 and 944 S2. I've only changed the oil once in my mustang and used the same setup, bosch filter with Mobil 1 synthetic 5w-20. I did not have any new sounds, ticks or decreases in performance. After reading this I'll probably try a different filter... That in mind, I have trouble believing a filter can cause a tick. Have you looked at the spark plugs? You're at 50k miles and it's amazing what a little bit of gunk or mm change in width can do to the spark.
2012 Mustang v6
1969 Porsche 912