Good day gentlemen, I have a 2018 spec 360 with a dry sump system. It is fitted with the latest spec 420 combined rad/oil cooler which I think was originally fitted on race spec R400's. I have fitted the temp switch in the tank through to a toggle switch on the dash and then to the water gauge, so I can switch between oil/water temps. In yesterday's ambient of 10C and in normal, quickish when you can, road driving, the tank temp was about 55C max. Even allowing for the oil to be a good 5C above this when exiting the oil pump pressure side, it's still well below the ideal 90/100C. Not entirely linear but I'd expect this to be improved to around 75C in a 30C ambient. Today I blanked off the oil cooler front and did the same run (10C ambient again). Oil raised to a max of 70 C at the tank, so still lower than I would like. Potentially 90 C oil tank temp in a 30C ambient. Sure on track would be higher, but with the car doing mostly road driving my questions are this: Does anyone have part numbers/source for a an in line thermostat controlled bypass unit? What temps are others seeing on a similar set up? Thanks