I was running the Fram Ultra for the last few years, but after seeing the YouTube videos that Brand Rankings recently posted showing the Ultra being more restrictive to flow compared to the Endurance filter, I think I will try the Endurance. Endurance seems to have higher flow and about the same filtering capabilities of the Amsoil filters, but for less. Endurance oil filter packaging shows it to be a high flow oil filter and testing showed it was indeed higher flowing. Ultra filters are great at filtering, but restrict flow. I was debating between the even higher flowing Mobil 1 filter, but the filtering media looks like it’s cheap paper over the full synthetic media of the Endurance filter.