Are factory full flow oil filters inadequate?
According to oil filtration studies done by major oil company and a large diesel engine manufacturer in the 1960’s, contaminants less than 5 microns cause most engine wear. Yet, most of the filters made today have difficulty filtering to less that 20-40 microns. The problem is that the filters must be porous enough to allow full flow, limiting their ability to filter. If they were made to filter any finer, they would become clogged, the built-in bypass would open, and the engine would receive unfiltered oil, which is even worse, that poorly filtered oil. Highly purified oil through a USPI filter gives you much less friction and wear, and much cooler running, longer running engines. Tests show that using a secondary ‘bypass filter’ in addition to the full flow factor filter reduces – rod bearing wear – 98%, main bearing wear – 96%, piston ring wear – 92%, and average wear – 95%. Most full flow filters filter out particles only in the 20-40 micron size, and most bypass filters in the 5-2
