Have started my rebuilt 413 engine. It is still in the brake-in stage. When cold, oil pressure is above 50. As the engine heats up, the pressure begins to drop and settles at about 25 psi at idle (Approx. 900 RPMs). I brought the RMPs up to 2,500 and the pressure went back up to above 50 psi. Is this normal, or do I have a problem? The oil in the engine is 10W-40, Sensor and gauge are new. Do I need to go to a different grade/weight oil or use an additive?
Also, how many miles is the...
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Also, how many miles is the...
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