https://www.hexorcism.com/16ND/sh13083/
The ND Miata in North America has a two step oil pump controlled by engine variables. Different oil PSI bypass settings for different engine conditions. In North America the Operator's Manual says only use 0w-20 with SN rating
Same ND Miata in Europe and Taiwan gives two choices for oil weight. 0w-20 and 5w-30.
The above link shows a two step PSI bypass valve controlled by a on and off pilot valve. That pilot valve is controlled on and off by the car computer and adjusts by inputs from crankshaft sensor, water temp, mass flow, manifold air pressure.
The North American ND Miata has only one thermostat, the rest of the world has many different options.
I do not know if the programming is the same on my North American Mazda or it is the thermostat difference is what controls the pilot valve operation versus the rest of the world.
My water temp when warmed up is rock steady at 208 f (98 c) see temperature set on the oil control link.
1. Which oil choice 0w-20 or 5w-30 would you choose?
The ND Miata in North America has a two step oil pump controlled by engine variables. Different oil PSI bypass settings for different engine conditions. In North America the Operator's Manual says only use 0w-20 with SN rating
Same ND Miata in Europe and Taiwan gives two choices for oil weight. 0w-20 and 5w-30.
The above link shows a two step PSI bypass valve controlled by a on and off pilot valve. That pilot valve is controlled on and off by the car computer and adjusts by inputs from crankshaft sensor, water temp, mass flow, manifold air pressure.
The North American ND Miata has only one thermostat, the rest of the world has many different options.
I do not know if the programming is the same on my North American Mazda or it is the thermostat difference is what controls the pilot valve operation versus the rest of the world.
My water temp when warmed up is rock steady at 208 f (98 c) see temperature set on the oil control link.
1. Which oil choice 0w-20 or 5w-30 would you choose?
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