Joel,am pretty sure that the gauge was not the problem because i tried to do the mechanical way. I installed the mechanical gauge(oil pressure gauge) and the reading was the same. If the engine was cold the reading was 60 psi and let the engine idle fro maybe 30 minutes and the oil pressure reading will go down to 2 to 0 and that is the time you can hear the small knock on the valves but not so loud. I tried to change my oil with the SAE 10W30 but it is still the same.But anyway what is the best oil that i need to use for this kind of engine? What is the weight that you can recommend? Where is the location of the oil pump? Can i repair it by myself? Or do i need to take out the oil pan? Thank and i really need your help guys and i appreciate it.