Quote:
Originally Posted by NHB
I don't quote understand your logic. You are ready and willing to lower the viscosity by heating the oil but you don't want to use a lower viscosity oil at lower temperature.
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Simple actually :
He wants to reach normal operating temperature faster.
He shain't damage the gearbox with this approach if temperature don't go too high.
If changing oil to a different viscosity, he would give up on Toyota's engineering expertise in designing his gearbox.
I am working in automotive and had this discussion over and over with my father : there is a fair amount of knowledge put in automotive engineering and care should be taken when trying to improve on design, especially high stress parts.