I am leaning toward the fram ultra more these days. we still use the Wix jobber filters at the shop but i also sometimes used the napa gold but switched to the ultra for the premium long oci filters mainly because Napa Gold filters are not synthetic and the build quality of the ultra is also very good. I know many here know i like a filter that flows good and out of those two i don't know which one flows the best but the ultra is the synthetic one and their threads are always perfect compared to the napa. Just my two cents