His post says he’s in PA, not FloridaTrue but he lives in Florida so the cold is no issue. Toyota has a feedback system as it would be folly to design the system to have a blindfold on it. The system variates actuation dynamically and checks what was done and readjusts as oil is always a different viscosity and there are thick and thin 0w-20's and some shear worse than others. Toyota knows what they're doing. The Toyotas in Europe run 4 grades up in their owners manual from the minimum. 0w-20 to 20w-50. in the manual. And every one is vvt.
Also, the Hilux doesn’t get the 2GR-FKS, it gets a D4-D (diesel) and doesn’t get VVT-i
And are the VVT oil control valves the same between US and RoW?