if you want to run longer in between oil changes I would suggest getting a synthetic filter. I switched to the RP filter and am giving that a try. I will cut it open at 5k and see what it looks like and make my determination from there with the oil evaluation. if it seems good I may try running it longer. I also use a larger filter, I can look up the number if you would like. In conjuction with the RP I always use Zmax as well. This all may be overkill especially with my 34 row oil cooler but it gives me a piece of mind. If I find that the RP is not doing what I like I will switch to something like redline or amsol.
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