Hi all, New to the forum and after a bit of advice please. I have a 2004 x-type 2.0d and its approaching 220k! I'm currently using the recommended oil 5w30 fully C3 and im getting a bit of rattle from the timing chain, i recently removed the cover and inspected the chain and guides all looked good, replaced the hydraulic tensioner. but still get rattle when it warms up! to cut a long story short, has anyone used a thicker oil like 10w40 or maybe even 20w50? any advise is appreciated thanks.