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Probably information of limited value unless you are looking for a better filter, which would be Purolator PureOne PL10241. Other issue is capacity which related directly to amount of pleated media in the filter. I understand that the Saab filters are quite good in that regard. If you run longer oil change intervals, that is important. For those who change their oil at 3K, capacity is probably not a big deal. Some filters with less media and capacity are probably not filtering small particles well as a combination of a small particle efficient media with a small area of media would be flow restrictive. A good synthetic oil would perhaps generate less crud to get filtered out than dyno oil. The amount of metalic wear material will be very small and that by itself would not challenge the capacity of a filter. And most wear metal particles are so small that much will never get trapped by a full flow filter. So the only way to remove these is to drain the oil. These paricles can accelerate wear of rings, pistons, chains, cams, lifters etc where lubrication is more boundary layer than fluid layer. New or rebuilt engines should have early oil changes to remove the wear metals which are generated at very high rates. A really strong megnetic drain bolt will take the hard steel and iron wear particles out of circulation, something that a filter cannot do. The captured black particles can be seen with every oil change. Feels like something creamy. If there is a chain failure or worn sprocket teeth tips been lost, a magnet can capture these and provide a warning before a catastrophic failure. Very small particles of bearing lining and aluminum will not be so damaging as the hard ferrous materials. Top piston rings might not be magnetic if highly alloyed and wear particles from these would not be friendly and a magnet may not remove these. Anything found in a magnet like a machining cutting would not be a problem as it would not get past the oil intake screen and is probably harmless but not 'good housekeeping at the factory'. Grit sized paricles on a magnet that could get through the intake screen would worry me.
posted by 66.139.12...
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