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#4758087 - 05/15/18 05:37 PM Ash content in different base oils.
sloinker Offline


Registered: 08/13/17
Posts: 55
Loc: WY
Figured the knowledge base on the board could provide some general answers. In a diesel that has a particulate filter and does regeneration, which base oils produce the most ash and of these ashes, which will continue to burn off during regeneration. I may be falsely assuming that I and II may produce more ash but would also be more fully consumed in regeneration and that some III, IV and V may not burn at all. I guess the additive package should also be weighed. Calcium, detergents, Zinc, phosphor's, moly etc. Which base + additive package would offer the most robust protection in the 5W-30 range with a 10,000 mile OCI, but also create little ash that won't be consumed. In my case a direct injected, turbocharged diesel with a 5W-30 spec. I imagine this info could also apply to many other diesels. Edemucate me please.


Edited by sloinker (05/15/18 05:38 PM)

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#4758107 - 05/15/18 06:04 PM Re: Ash content in different base oils. [Re: sloinker]
Boomer Offline


Registered: 09/19/08
Posts: 1924
Loc: Pennsylvania
I have a 2013 Passat diesel (see signature). I know they are really picky about inorganic ash buildup over time and therefore require a VW 507 oil which has a very low inorganic ash content. Oil, which is really just long polymeric molecules of carbon, hydrogen and some oxygen, nitrofgen and a dash of sulfur, should not produce much non-combustible ash on it's own. It is really the additives such as calcium, zinc, etc that you pointed out that form the non-burning as that will eventually load up your DPF over time. I depend on VW 507 specification for oil and always use the Castrol 5W-30. I think the manufacturer's specs will be what you need to follow and not worry what base oil, etc was used to achieve this.
_________________________
2013 VW Passat TDI SE, 56,150 miles Castrol Professional VW507 5W-30
2017 VW Golf All Track 13,850 miles Castrol Professional VW505 10W-40

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#4758114 - 05/15/18 06:09 PM Re: Ash content in different base oils. [Re: Boomer]
sloinker Offline


Registered: 08/13/17
Posts: 55
Loc: WY
I have two EA288 VW's that require the 507.00 spec. I am not real happy with the factory fill Castrol's published performance specs. I want a really low cold pour point but don't want to load up my DPF if it can be helped. Just curious as to how class III,IV and V respond to regeneration.

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#4758177 - 05/15/18 07:21 PM Re: Ash content in different base oils. [Re: sloinker]
benjy Offline


Registered: 08/23/10
Posts: 824
Loc: pa
depending on your wallet, a real synthetic $$$$ or fake synthetic $$ as most are today, a search will show many + Mobil I ESP 5-30 comes up + is readily available, Motul + Total Quartz are also approved. mail order is easy, i buy the rarely seen Redline products on line, + if lucky you can get deals on E-bay as i do. walmart ships to store free with a $35 minimum order as well as their in store stock varies by store.


Edited by benjy (05/15/18 07:41 PM)

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#4758329 - 05/15/18 11:23 PM Re: Ash content in different base oils. [Re: sloinker]
sloinker Offline


Registered: 08/13/17
Posts: 55
Loc: WY
I'm using the Red Line now. Probably go to M1 esp next time. A little concerned over un-burnable deposits shortening the life of the dpf. I want the best of all worlds I suppose. Extreme performance oil that is DPF,Catalyst and EGR friendly. I don't mind paying the price since I am doing a 10,000 mile OCI and the "boutique" oils are only a couple bucks more than the factory fill per quart.

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