Your thread on 454 BB has me interested in what to do next. That engine was replaced in my 2000 Workhorse MH with a remanufactured Jasper engine. From the start, the hot engine oil pressure is 20# at every RPM between 2K and 3K, doesn’t matter. Idle RPM at 600 and pressure is 10 or less lbs. No break in oil came from Jasper and shop used 5W30 synthetic. Changed after 550 mi with the same type and weight of oil with no effect on oil pressure. Mechanic confirmed instrument panel reading is correct. What type of oil, weight and frequency should I use to improve oil pressure? Any other suggestions or ideas to get improved oil pressure. Original engine (45,961 at time of rod or main knock) operated at least at 40# oil pressure at 2K RPM.