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Do Oil Filters Have Check Valves?
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Do Oil Filters Have Check Valves?
Do Mobil 1 oil filters have check valves? My filter is installed with the drain pointed down and so I want a filter with a check valve to minimize how long the engine is dry after starting.
-- John Thiessen, The Woodlands, TX
Anti-drain valves are installed in the filters for those vehicles where the manufacturer requires it.
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