From what I gather, the increase in the number of pulses to correct the VVC mechs is due to you reducing the response time to replicate a more viscous oil used. This shows how the vvc mechs are calibrated to the oil temps related viscosity. I think you would need to gauge if using a more viscous (50) oil has a similar effect to reducing the response time, the difference in the viscosity maybe marginal. The reduced response time may be the equivalent to filling your engine with treacle. It would be good to see the pulses generated using both 10w40 & 5w50 to show if it has any effect on the adjustments made by the ECU to show realistic effects.