Whether with 0W40 or 10W60, oil will be around 210 most of the time. Maybe it is 10 degrees hotter with the thinner oil or 10 degrees cooler with the thicker oil. Only on the track or during the kind of hardcore driving I have not experienced in my 2 years with 0W40 (following 3 years with 10W60) might the oil cooler not keep up.
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