Ian I have got some interesting issues on my 99 P38. I haven't torn into it much yet but far enough to know I have an OVERFILL showing on the dipstick and gas in the crankcase. I asked my RR dealer tech about the oil cooler being plugged and he said he had never seen it before. Your post about sludge plugging the pickup and maybe the cooler made a lot of sense to me. Have you seen or heard of a cooler getting plugged?
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