Yeah, I'm thinking I may drop back to 5w-30 the next time I change the oil. This oil pressure stuff can likely be thought of as being equivalent to electricity.
- Current = actual oil flow.
- Resistance = restrictions to oil flow in the engine.
- Voltage = oil pump delivered pressure.
More oil flow in an engine is going to be better than higher pressure. Within reason, of course. You do need enough pressure to pump up the hydraulic lifters and just move the oil to all parts where needed. Zero oil pressure is no better than the peak pressure that the oil pump is capable of. Both indicate a problem.