Whats the difference between full-flow and by-pass lube filters?
A full flow oil filter is mounted in full-flow, meaning all oil entering the engine is filtered. In full-flow filters, Cummins Filtration uses cellulose media (40 µm absolute) or upgrade media, such as glass fiber and StrataPore (25 µm absolute). A by-pass filter is mounted in the by-pass, so approximately 10% of the lube oil flow is passing through this filter. Cummins Filtration offers “real depth filtration” by means of its stacked disc media. As mean wear particles in engines are in the range of 5 to 30 µm, these particles cannot all be filtered out by the full-flow filter, as these filters would be too restrictive. Therefore, the use of a by-pass filter, such as Cummins Filtration’s LF777, will keep your oil cleaner and result in less wear on moving parts of engines.
