On my old P2 D5 I put the wrong spec oil in (the A/B number) and it sounded appalling even though the viscosity was right, swapped to the correct spec and it was much quieter. Can’t remember now what the A/B number is, but check you’ve got it right.
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2009 Volvo V70 D5 (Polestar 225bhp) r-design 180,000 miles
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