2005- V70 D5 185bhp valve rockers

[BillDD5]

Originally Posted by 5cilinder

The a5/b5 is responsible for the worn lifters (and maybe more with the long interval and fueldillution)
The reason it was prescribed was for emissions (low viscosity) and (lower)ashloading in the dpf
Not durabillity

Now a good low ash 5w40 isnt that more in ash deposits and if the engine isnt burning much oil the difference in ashloading will be minimal .
But ashloading isnt a problem when you take the dpf off after 100 or 200000 miles after you manualy regenerated it to burn all the soot so that the ash can be vibrated out like fine sand with the rest with some pressured air

The euro 3 d5ś where prescribed with a4/b4 oils (mostly 5w40) with virtualy the same block as an euro 4 also the lifters are the same
Ive yet to hear the first one that has worn lifters

I found out that ours had been given Millers Trident Longlife 5w30 (or a near Millers equivalent) that is a C3 spec oil. Oh dear!

[sv70]

Thanks Bill,at least i can cross that oil off my list,or can i,my brain feels mashed reading all these different types of oils we should be using,anyway i have got around 4 months before an oil change so that gives me plenty time to pick my poison.

[skyship007]

Although using a major brand idle flush just before an oil & filter change is a good idea (Unless you have any oil leaks), using an Xw30 in an old diesel or a new one that contaminates its oil with fuel is one bad idea.
The OEM spec oil was Castrol Edge 0w30, which is a high 30, so almost in the 40 range. The reason they selected a 30 grade would have been fuel economy related and although it's OK for a new block, it's too thin for a worn one, even before you consider just how quickly the oil gets thinned out by fuel contamination and that factor was not considered when they selected a 30 grade.

I don't know of anyone that uses an Xw30 in a diesel that is not under warranty, even the Iffy lube places use an Xw40.

[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,

[sv70]

skyship007,i have just read your dpf thread and you have answered my question in -use either a 0 or 5/40's fully synthetic,thanks.

[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.

[sv70]

Thanks skyship007,i think next month i will try what you suggest and also 5cilinder advises,in using a 5w/40's,using shell helix diesel ultra-B3,B4,also doing a liqui moly engine flush,and adding liqui moly ceratec,even if this doesn't stop the noise at least i know i have got the best protection for the engine,and then just do the lifters at a later date,i will post the results,thanks again all,for all the helpful replies.

[RoyMacDonald]

The problem with the A5/B5 oil is that it's additive package prioritises the DPF over the cylinder head protection. Some engineers are of the opinion that you should use an oil (A4/B4) that prioritises the head protection as it's cheaper and easier to change the DPF rather than the cylinder head.

Roy

[5cilinder]

To be fair , when i had it open to change the lifters the camshaft had no scufmarks etc

[skyship007]

Originally Posted by RoyMacDonald

The problem with the A5/B5 oil is that it's additive package prioritises the DPF over the cylinder head protection. Some engineers are of the opinion that you should use an oil (A4/B4) that prioritises the head protection as it's cheaper and easier to change the DPF rather than the cylinder head.

Roy

I agree with that as there is no much of a difference between a B5 and a B4 anyway. The problem seems to be with more significant with some of the C2 or C3 oils, as they really do cause higher wear figures IF they don't contain Titanium based anti wear additives as an alternative to Zinc ones. Alas those oils that do contain Ti are rather expensive. Even the oils that do have Ti don't have enough due to its cost.
Using an additive like Ceratec can make up for missing Zinc additives, but alas its not a cheap additive.