I have used Valvoline or Castrol GTX for oil mostly but have been using Royal Purple in the Rubicon. I change filters twice per oil change in rigs running the dino oil. I try to change the filters at 2500 miles and change the oil at the 5k mark.

With the synthetic I've been changing filters about every 3k miles, and putting between 10k and 12k miles per change. I think I'm changing the oil to early most of the time, but feel the good filters are well worth the money.

I've been using Napa Gold or Platinum filters which are made by WIX.

I've been an industrial mechanic most of my career and have seen most failures due to contamination rather than the oil being worn out. Modern oils have great additive packages. Oxidation ruins oils, so unless you are running really hot or getting moisture in the oil, contamination is most of what you should be concerned with.

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