My last xc90 my14 was recommended to use 0w/30 . On another train of thought though, how many people after a longish run at motorway speeds simply pull into the services and switch off. Always let the engine idle for a minute or two, helps to cool the turbo bearings down a bit without starving them of oil. Helped keep my Scania 560 bhp rolling along up to 620.000 miles before I gave up the job, still see the old girl knocking about on the motorway 10 years on. Only a thought.
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