Take the filter off cold engine. When you warm it up all you do is fill the filter with oil.
“Anti drainback valves” leak everything out in a short time. They exist to prevent the “water hammer” effect from back flushing crud out of the filter when the oil pump suddenly stops when the engine stops.
“Anti drainback valves” leak everything out in a short time. They exist to prevent the “water hammer” effect from back flushing crud out of the filter when the oil pump suddenly stops when the engine stops.