The Jeep manual suggests that you should use 5-30 synthetic oil, however many specialist tuners of the PD engine are reckoning that that this is too thin and that a 10-40 semi synthetic is better, which is interesting.
spencernj
just seen a fair few of your posts
you seem to know a fair bit about the CRD engines
we have a 08 CRD here in sunny melbourne, i'm guessing it's the PD
our service regime here is 6 months / 9000k's (we only do 6000k's in the 6m)
i've previously asked whether it has a DPF and been told yes and no. i buy very expensive oil for it, to VW spec 507.00 5W30 syn, but that was due to my belief that it had a DPF
can i drop down, as you suggest, to a cheaper semi syn 5-30 or 10-40?
you seem to know a fair bit about the CRD engines
we have a 08 CRD here in sunny melbourne, i'm guessing it's the PD
our service regime here is 6 months / 9000k's (we only do 6000k's in the 6m)
i've previously asked whether it has a DPF and been told yes and no. i buy very expensive oil for it, to VW spec 507.00 5W30 syn, but that was due to my belief that it had a DPF
can i drop down, as you suggest, to a cheaper semi syn 5-30 or 10-40?
The oil normally has nothing to do with a DPF. Oil does not normally effect a DPF if fitted. The PD engnine (assuming that is fitted to Australian Models as it is to the EU ones) is not really suited to a proper DPF, so if one is fitted as an option I would seriously question its efficiency and longevity. If anything a thin oil is worse for a DPF as it increases oil burnt.
I keep seeing people say a DPF is/has been available on the 2.0 engine but I can find no information on this, and I suspect its a rumour. If it had been the case and an effecitive DPF was fitted then this model could have been able to be sold in all US states which is is not and would be Euro V compliant (which it is not) and the change to the 2.2 Merc engine to meet obligatory Euro V compliance from Oct 2010 would not be needed.
I have in another post explained why the PD engine needs this supposed high spec oil due to the need to protect the cam actuated injectors, but I believe that 5-30 does appear too thin and for better turbo wear and other components then a 10-40 or 15-40 may be better. I intend to use 10-40 semi in the future.
However, a regular oil change with any oil is better than infrequent ones with "high spec" oil. I would be more inclined to change the oil more often on vehicle that is low mileage and does a lot of short journeys than a high mileage long trip vehicle. Remember more engine wear occurs in 2 mins from cold than two hours at high motorway speed.
Personally I would use the manufacturers reccomended oils if the vehicle is under warranty.
But where do people get these fancy oil specs from?
I am sitting here with the manual from my UK 08 vehicles which states on page 154 (and repeated on page 137)
Diesel Engine (ACEA A3/B3, A3/B4, or A3/B4/C3; SAE 5W-30, SAE 0W-40, SAE 5W-40, SAE 10W-40, or SAE 15W-40 Engine Oil.) No other specifications are mentioned especially a VW spec nor is any other spec written on the filler cap or engine bay.
My research seems to suggest that A3/B4/C3 is equivalent to VW 505, but as you can see lower spec A3/B3 and A3/B4 are also reccomended.
I keep seeing people say a DPF is/has been available on the 2.0 engine but I can find no information on this, and I suspect its a rumour. If it had been the case and an effecitive DPF was fitted then this model could have been able to be sold in all US states which is is not and would be Euro V compliant (which it is not) and the change to the 2.2 Merc engine to meet obligatory Euro V compliance from Oct 2010 would not be needed.
I have in another post explained why the PD engine needs this supposed high spec oil due to the need to protect the cam actuated injectors, but I believe that 5-30 does appear too thin and for better turbo wear and other components then a 10-40 or 15-40 may be better. I intend to use 10-40 semi in the future.
However, a regular oil change with any oil is better than infrequent ones with "high spec" oil. I would be more inclined to change the oil more often on vehicle that is low mileage and does a lot of short journeys than a high mileage long trip vehicle. Remember more engine wear occurs in 2 mins from cold than two hours at high motorway speed.
Personally I would use the manufacturers reccomended oils if the vehicle is under warranty.
But where do people get these fancy oil specs from?
I am sitting here with the manual from my UK 08 vehicles which states on page 154 (and repeated on page 137)
Diesel Engine (ACEA A3/B3, A3/B4, or A3/B4/C3; SAE 5W-30, SAE 0W-40, SAE 5W-40, SAE 10W-40, or SAE 15W-40 Engine Oil.) No other specifications are mentioned especially a VW spec nor is any other spec written on the filler cap or engine bay.
My research seems to suggest that A3/B4/C3 is equivalent to VW 505, but as you can see lower spec A3/B3 and A3/B4 are also reccomended.
Thanks Spencernj for the valued info. I checked my oil on my 08 CRD with 11000.00 miles and it was right up where it should be on the dipstick. It was a bit black and it was changed last May 10.
Thats interesting so ours are different and we both have 2008 Jeeps.
Below are are the pages from the UK one.
My understanding of the 507 oil is that it is supposed to be a long-life oil designed for VW cars with a 20k miles service interval so using that then changing at 6000 seems madness.
I would not change more often than 6000.
However, there is some evidence from a quick Google that some VW Audi Group cars with a DPF and a PD engine use this oil but also have a long service interval. God knows how that works as the injector system of the PD cannot support the injection of fuel into the DPF to regen it. I wonder if its some sort of cludge. Can't see why the oil would effect the DPF at all, other than I suppose a small amount of oil that burns naturally. Here in Europe DPFs are only mandatory from cars manufactured this month and this is the reason for the change to the 2.2 CRD Engine as it is a Common Rail and not a Unit Injector engine which can support DPF regeneration.
Below are are the pages from the UK one.
My understanding of the 507 oil is that it is supposed to be a long-life oil designed for VW cars with a 20k miles service interval so using that then changing at 6000 seems madness.
I would not change more often than 6000.
However, there is some evidence from a quick Google that some VW Audi Group cars with a DPF and a PD engine use this oil but also have a long service interval. God knows how that works as the injector system of the PD cannot support the injection of fuel into the DPF to regen it. I wonder if its some sort of cludge. Can't see why the oil would effect the DPF at all, other than I suppose a small amount of oil that burns naturally. Here in Europe DPFs are only mandatory from cars manufactured this month and this is the reason for the change to the 2.2 CRD Engine as it is a Common Rail and not a Unit Injector engine which can support DPF regeneration.
Attachments
do you know where the DPF would be if i had one?
assuming i don't, could i drop to a semi syn 10-30/40 or what are your thoughts?
assuming i don't, could i drop to a semi syn 10-30/40 or what are your thoughts?
I do use 10-40 semi synthetic for almost 6 months which being recommended to me a long time ago by my friend in Texas.
I have the same engine in a passat cc and the oil service interval is 15 thousand kilometres. I think Jeep have lowered the interval because these VAG engines are known to consume oil (some have actually run out and seized) so Jeep are not taking any chances. The engine works a bit harder in a Jeep.
Best all rounder--Fully synthetic Diesel 5-W40, Mobil 1----Then forget about it for another 9,000 miles!!
Spencernj: bit late reaction but for the interested, i hve a 2007 CRD without DPF and a 2008 CRD ( made only 2 months later In 2007) with a DPF.
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