Hi Bentleyboy1,     My car on an average UK day, on open road driving at about 40mph as I leave home on cold engine will be 1 bar in 200 yards, 2 bars in 1/4mile and 3 bars in about a mile. So pretty quick.  I have a digital oil temp gauge and that shows <20c , 35c and 45c at those points. Normal oil temp is 100-105 and that takes 4.5 miles.

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