I had the same issue on mine. I marked the hose end fitting where there was a slight outward flare on the crimp fitting and took the hose off and carefully ground the edge flared out so it was flush with the rest of the crimp body. That helped a lot and I found that once I got the filter screwed on a few threads, once the crimped edge of the filter was past the oil line crimp flare, it had had enough clearance. I also switched to a different filter manufacturer,,,,I THINK it was Tempest IIRC, and it fit a lot better. I thought about replacing the fitting to an angled one but did not want to buy a new hose for a longer one.
RV-9A: Under Construction.
RV-10: Completed 12/29/2013 SOLD 08/23/2016
"Donor Exempt" but donated through Dec. 2019