After rebuilding the engine and the oil pump on my 57 to35 I only picked up 5 lbs. of pressure on the gauge,(20 to25). Then while fighting the loss of pressure on my fe35 with the standard gas I swapped out the 2 gauges. Then the elcheapo ebay gauge with the colors barely stayed in the green and eventually stayed in the red so I thought the set screw on the oil pump gear had stripped so I'm pulling the pump, checking the orings, setscrew,and found nothing wrong so i finally put in a third gauge and walla 30 lbs!!Moral of story--- Don't buy cheap crap on ebay!!Here's an after and before pic of old smokey and no that's not the tires smoking.