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    oil pressure and type of oil

    Can you raise or lower the psi of oil pressure by changing the type and grade of oil? i.e. For instance, can you raise the psi by switching from 15w40 to SAE40 (Perkins 6.354.4) if so, how much of a change can you get? Thanks
  2. D

    low oil pressure after rebuild

    We have a power boat with twin Perkins 6-3544M 200HP turbo diesel engines. We replaced a cracked block with a new one which came out of a turbo diesel tractor. Everything fits perfectly and the engine runs smoothly but I have extremely low oil pressure. I have run the engine for hours and...
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