My R34GTt auto is completely standard and has approximately 100,000 klms on it. The oil temperature generally ran about 90°C. or a little higher, when driving under light load when the ambient temperature was mild. As it has an oil cooler which uses the engine coolant to cool the oil, the oil temperature will always be above the coolant temperature. Generally this means the oil temperature will be at least 10°C. hotter than the coolant temperature. From my experience, driving through hilly terrain will send the oil temperature to around 100°C. or more. My air-conditioning has also cut out in stop start traffic with temperatures in the high 30s. Cruising at 110klm/hr. with air-conditioning on, in the high 30s, coolant temperature was noticeably higher than normal. I believe the air flow through the radiator is restricted due to the small aperture in the grill. What I did to correct the high running temperatures, was to fit a new viscous fan hub. So far, this has improved the temperature situation noticeably. The only disadvantage, is significantly more fan noise.