It is moot that is a very marginal difference and the Vvt does not notice. I have run up to 0w40 in my Tacoma and my 4 runner with no issues With power, performance, or with mileage.
I am running 10w30 in the Tacoma right now.
Again, despite urban legends, the position sensor and the ecu control the retard and advance position. The oil viscosity does not in the toyota system., the oil is simply the energy to move things. the ecu and the actuators throttle and adjust that position constantly to maintain the throttle position,
(I will hedge to say there were certain american cyclinder deactivation systems that were viscosity sensitive, but I do not know them well.)
Additional reassurances can be had with the same systems used in other countries where the span of oils in the owners manual goes from 0w20 to 15w40. There is no difference in the engines. A gr in Australia is the same gr used in North America.
Originally Posted by CONMCK
Originally Posted by Bryanccfshr
Nothing, the control of the timing is from the ecu. It simply opens actuators that apply oil pressure to the camshaft gears in relation to timing. Pressure is pressure.it is simply an energy source to move the gears and lobes to the desired position, duration, lift and timing,
The fact that this can be constantly changing and adjusting to driving conditions, rpms, and load demand is hard to visualize. The fact that pressure moves the actuators when given an electronic signal is not. It's not a throttle, it's a on off. Switch.
Originally Posted by CONMCK
Originally Posted by Fallguy
Is it possible/probable for 5w 30 to throw off VVT in a 5w20 specked vehicle ?
So what happens to the functionality of a VVT engine before the oil reaches operating temperature??
SO then 5w-20 vs 5w-30 is a moot point in this case??