Then why did the oil pressure change with the different filters? If the gauges were driven dumb from the ecm. Reducing delta P across the filtering media. Would have no impact upon the panel display(s). Oil gallery pressure would increase if the oil pump relief valve spent less time open or open less with the reduced restriction filter. The restriction to oil flow would be reduced in the filter. Thus increasing pressure in the engine's oil galleries if the lube gallery passges/orfices metering stayed constant.
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Today's Featured Article - Reflections of the Fifties - by "Country" Elliott. I remember rowing up in the 1950�s in a small, rural town in northwestern New Jersey. The closest town to ours was only 3 miles away, and there were seven dairy farms in the areas of these two country towns. We had 5 acres, and because my Dad was a salesman and not a dairy farmer, he let the Bockovens, who owned the Willow Tree Dairy farm most of our land.
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