The job of the oil filter is pretty straightforward - remove contamination from the oil. That seems fairly simple, but not all filters do that job the same. In this test, we intentionally contaminate the engine oil and run it in our dyno mule engine to see how well two different filters perform. More importantly, what happens to the engine when we contaminate the oil? #engine #dyno #oil #oilfilter For more on Dyno Don, check out For more on Oil Analysis, check out @themotoroilgeek