There was a very small video study done with 2 experiments. One with dirty oil, clean filter and the other is clean oil with dirty filter.
One has to be better than the other, the one that came out as a clear winner was the old oil, new filter. It’ll be closer to 3x more effective to have a clean filter versus an old filter as opposed to the oil being clean and filter dirty, it seems to have 0 benefits as the clean oil is running through a dirty filter.
There was a very small video study done with 2 experiments. One with dirty oil, clean filter and the other is clean oil with dirty filter.
One has to be better than the other, the one that came out as a clear winner was the old oil, new filter. It’ll be closer to 3x more effective to have a clean filter versus an old filter as opposed to the oil being clean and filter dirty, it seems to have 0 benefits as the clean oil is running through a dirty filter.