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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WK Grand Cherokee & XK Commander Forum > Time for my first CRD oil change!

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Unread 08-14-2013, 02:35 PM   #31
Palak
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I just spoke with the local (Authorized) Mercedes dealership.. Only place in town that carries an MB 229.51 spec oil.. (only place in a 400mile radius actually!)
I showed them that MY owner's manual says I need a 5W-30.. he proceeded to show me that in EVERY diesel engine on the lot, the book says 5W-40 for his MB engines.
And YES, they have DPF's..
I would say it's NOT going to cause a problem with the DPF using the 40 over the 30. They use Mobile 1 ESP M 5W-40 at this dealer.

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Unread 08-14-2013, 03:14 PM   #32
Ditchd
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Quote:
Originally Posted by Palak View Post
I just spoke with the local (Authorized) Mercedes dealership.. Only place in town that carries an MB 229.51 spec oil.. (only place in a 400mile radius actually!)
I showed them that MY owner's manual says I need a 5W-30.. he proceeded to show me that in EVERY diesel engine on the lot, the book says 5W-40 for his MB engines.
And YES, they have DPF's..
I would say it's NOT going to cause a problem with the DPF using the 40 over the 30. They use Mobile 1 ESP M 5W-40 at this dealer.

Most of the points already covered, question remains, why does uk advice differ from US advice for exactly the same engine and why do oil experts ie the boffins at the oil companies reflect the UK style advice ?

What was his explanation for why it wouldn't cause a problem for the particualte filter ?

If my book says w30 I would choose that over and above what's in a random vehicles handbook. Did he also demonstrate that they all have the same components and its only the handbook and sump contents that differ ? Ie are the same partic filters fitted ? Gm and fiat changed theirs , looked the same but worked properly !!

I'm also intrigued that only one place carries that spec !!!????!!!!!! Is it a very small town ? . that spec is extremely common and matches the performance of most of the GM , Ford and BMW specs.
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Unread 08-14-2013, 03:36 PM   #33
jamie1131
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UK Jeeps don't have a DPF hence different recommendations.
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Unread 08-14-2013, 11:48 PM   #34
Ditchd
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Rubbish.read the thread properly.
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Unread 08-15-2013, 12:26 AM   #35
chrali
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Quote:
Originally Posted by jamie1131 View Post
UK Jeeps don't have a DPF hence different recommendations.
My UK Commander does!
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Unread 08-15-2013, 02:56 AM   #36
jamie1131
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Its not rubbish at all. My WH is not fitted with a DPF therefore doesn't need .51 spec oil.
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Unread 08-15-2013, 04:03 AM   #37
Ditchd
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Quote:
Originally Posted by jamie1131 View Post
Its not rubbish at all. My WH is not fitted with a DPF therefore doesn't need .51 spec oil.
It was rubbish, straight away someone posted their uk CRD has a filter lol

Read the thread properly.

considering mb oil spec. If you have a read of the data sheets you will see that the .31 carries the same considerations with regards to low ash etc as .51 (Merc state the oil must not contribute to or cause emission problems and specifically mention particulate filters) so in that respect ie filter considerations it makes little or no difference but of course we need to take heed of what merc recomemd There are .3 and .5 standards but if you look around all the good quality oils seem to just go for .31 and .51 . I guess it's just coverall with no detriment perhaps

However the .51 & .31 refer to the engineering of the oil and not just it's ability to work with the particualte filter. Essentially there's a list of things and it simply measures the level of achievement of the oil as outlined in Mercs info sheet "requirements in respect of engine oils " you can't simply say I don't need .51 because I haven't got a particulate filter. Mine recommends .51 and I don't have a particulate filter. If yours recommends different well there you go but it's a bigger picture.

However we digress from the main point of the thread, viscosity recommendations ................

Filter equipped cars in the uk are recommended w30 , in the US w40. Same engine fitted to wk, same company , why ?

No filter cars w40 worldwide unless different is needed for operating conditions.

The joker in the pack or the conundrum is the advice from oil companies who,lets be honest unless you're one of their boffins and I suspect you're not probably know a lot better than us the ins and outs of it, reflect the uk advice.
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Unread 08-15-2013, 04:53 AM   #38
jamie1131
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Take a look at Mercedes standards 223.2 and 224.2.

These tell you what specs of oil (223.2) you can use and what viscosity (224.2).

Viscosity is temperature dependant. You can run a 20w-50 if you want as long as the outside temperature doesn't drop below -5C.
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Unread 08-15-2013, 05:06 AM   #39
Ditchd
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Very well aware of them and have read them. They are variables as you correctly point out i even memtioned them in my last post !!!!!!! Howeverthat is not the point that was raised and has been discussed.

That is recomemded viscosities and why.

Ultimately a W30 as recomemded uk will never be a thick as a W40 recomemded US for STANDARD EVERDAY AMBIENT USE, So why the disparity. What necessitates that or is it a massive Merc typo ?

Easy question, lets have an accurate answer without diversionary comments.
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Unread 08-15-2013, 05:29 AM   #40
jamie1131
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In the UK w40 is recomended for non-DPF cars, w30 for DPF cars. I suspect this is due to availability of 229.51 in a w40 grade here in the UK.

The fact is the manufacturer (Mercedes) says you can use any grade as long as its appropriate viscosity for the climate and meets its standards.
Eg for my car (no DPF), in the UK I can use a 20w50 as long as it complies with 228.3

If I had a DPF I would be restricted to 228.51, 229.31, 229.51 or 229.52.
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Unread 08-15-2013, 05:39 AM   #41
Ditchd
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Quote:
Originally Posted by jamie1131 View Post
In the UK w40 is recomended for non-DPF cars, w30 for DPF cars. I suspect this is due to availability of 229.51 in a w40 grade here in the UK.

The fact is the manufacturer (Mercedes) says you can use any grade as long as its appropriate viscosity for the climate and meets its standards.
Eg for my car (no DPF), in the UK I can use a 20w50 as long as it complies with 228.3

If I had a DPF I would be restricted to 228.51, 229.31, 229.51 or 229.52.

We've been through all of that, the question remains, why the transatlantic discrepancy that was revealed after I posted my first comment ?

Yours is 228 ????

Fact of the matter is , and its repeated in your post , it's not a 40 for general uk use. You actually reiterate the question I keep on asking . Why 40 in states and 30 or 40 in uk. Especially when it's 30 vs 40 in filter cars. The start up and ambient temp do not vary across the water sufficiently for other manufacturers to recomend similar differences.

The climate does not vary that much across the pond in its general extremes and if you put US details into an oil selector from the major oil manufacturers you will see an answer that you may not expect.
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Unread 08-15-2013, 05:46 AM   #42
jamie1131
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Yes, read 223.2. You can use the following oils in an OM642 with out the DPF:

228.3, 228.5, 228.51, 229.3, 229.31, 229.5, 229.51 or 229.52
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Unread 08-15-2013, 07:36 AM   #43
chevra
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Well here in Canada at the dealership I deal with they have always used 5w40 in there CRDs, they say it never has and never will cause a problem with DPF or without DPF even if the manual recommends 5w30. Just thought I would throw that in there ha. It doesnt really matter to me anyways cause I will be removing the DPF shortly and switching to a 0w40 oil.
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Unread 08-15-2013, 10:10 AM   #44
scootr29
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Quote:
Originally Posted by chevra
Well here in Canada at the dealership I deal with they have always used 5w40 in there CRDs, they say it never has and never will cause a problem with DPF or without DPF even if the manual recommends 5w30. Just thought I would throw that in there ha. It doesnt really matter to me anyways cause I will be removing the DPF shortly and switching to a 0w40 oil.
Mobil 1 0w40 is the best engine oil
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Unread 08-15-2013, 10:25 AM   #45
Xmind
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I always seem to find the best prices through Amazon actually. I got a 12 pack of 5w-40 Mobil 1 ESP for $97 a few months ago. I just changed it again today and bought two 6-packs of the oil for $47 each from Amazon. Did the AmazonPrime trial and got it in 2 days without shipping costs.
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