[skyship007]

Originally Posted by sv70

Thanks for that skyship,so the 0/30's is only good for new or nearly new engines,could you please give me your opinion on which oil you would use yourself on a D5 euro4 185 bhp engine with 276K miles on it but runs brilliant,only has the tug boat noise due to the lifters,

Any major brand full synthetic 0 or 5w40 that has the correct Acea spec's. Shell Ultra is one of the best and they do make a low ash version. I would also add a can of Liqui Moly Ceratec to try and slow down wear to the cam lobes and lifters.

If you get a top end problem with an older engine, there is no point using too thick an oil, as it slows down the flow rate, but it does help to beef up the additives.
If the main bearings start to rattle, things are different and in a bad case Mobil 10w60 EL (It's a high mileage oil) should work well if you don't have a DPF.