I just looked this up: LR themselves messed around with the specs. Just two years later with same Ingenium gasoline engine they changed the spec to STJLR.51.5122 which dropped the viscosity from 5w30 to 0W-20. That new spec had the effect of lowering the ZDDP too. This tells me the motor can...
Have a Range Rover (U.S.) with 2.0L turbo 4 cyl., 2016. The factory required oil from 7 years ago is Land Rover spec STJLR.03.5003. Rather than go to the hassle of ordering Euro oil here in the U.S., any reason I can't substitute a readily-available U.S. synthetic oil rated SP/ILSAC GF-6A/GM...