What I did was I bought the oil filler cap and oil filter cap assemblies from them. I all ready had the oil filter housing bracket from Amsoil. Then I used a large Amsoil filter that holds over a quart of oil along with a deep oil pan that holds another two quarts of extra oil. The truck now holds almost 14 quarts of oil that goes through two oil filters ( stock Ram oil filter is around 30 microns I think), the Amsoil filter is close to 3 microns? I change all three filters, (two oil, one fuel) every 10K. I imagine that’s overkill for many people, but for me it’s piece of mind knowing that I have 14 quarts of cool, clean oil running through it at all times.