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I've been running bypass filters on my diesel trucks and tractors for a few years. The results have been better than expected. I go 25,000 miles between oil changes in diesel trucks and the oil looks almost new when I drain it. All my oil samples have been extremely low on all contamination.
Small 1 pint unit. Weight 4lbs. Samples the oil off the oil pump at 6 quarts per hour. Returns the oil through the oil filler neck. My goal with the filters is to reduce greatly the ash and lead in the oil. Thus reducing wear and carbon build up on my waste gate. Also, bypass elements absorb up to 2 oz of water. Most jet engines have this type of filtration. They just never trickled down to us small engines.
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