Not a good sign. I don't know what White Sheperds Oil is supposed to do, but adding any additive that supposedly plugs an oil leak is not a good thing. Especially if you don't first know where the oil is going. If it is not dripping out of the bottom of the car or the intercooler weep hole, it is probably making its way past the valve stem seals on older engines.
AutoRx is meant to clean ALL of the sludge out of an engine, not stop any leaks. Will it work for yur car? Probably not in its present state.
Oil pressure drops because of either a failure in the sensor, not likely, or an O ring on the pick up tube at the bottom of the sump. Replacing O rings is not fun because removing the oil pan is a pain. Besides, there is no gasket, just glue (RTV) to put the pan back on. The O rings are cheap and you should buy OEM if you go that route.
A mechanic can verify that the oil pressure is close to zero. You could also put in a couple of quarts of 20W30, depending on how cold it is outside. But you cannot drive it if the pressure is too low.
Klaus
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Always willing to listen, just not able to take direction.
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