Diesel Engine Oil Opinions

[jeeptrout]

Currently I am using Diesel magnatec 15-40 and touch wood (picture me with my hands on my head) seems fine. Remember though that if you do not operate with a good EGR or modified egr you are dumping a tremendous amount of soot into your engine, someone thought it would be better in your engine than on the road or in the atmosphere or something.

Thanks for that, so can you tell me more about the EGR? What is it and what do you modify on it?

[Pipeliner]

At the 48,000 service yesterday Albion Jeep used Mobil 0-40.

[TonyCRD]

Guys, not to empty your pockets but in my experience ( +20 years as a profesional mechanic) I'd advise you to go FULLY SYN on our CRD's.

Why?

If you do your own oil change: put your hand in the oil you just drained. If it stains your skin for the next 2 weeks you know your oil is crap.

Why?

That stain is caused by carbon leftovers that haven't been embedded by the little cleaner bugs in your engine oil (sorry, can't explane it any better in English). A good oil 'eats' dirt like white bloodcels, (maybe that makes better sense) so the dirt or carbon / metal residue gets totaly covered by a coat of oil, prohibiting that bugger to scratch your bearings or pistons.

I use a fully syn oil, MOBIL 1 5W40, specialy designed for high pressure diesels.

Yes it's expensive. So is an engine overhaul...

[glend]

There are Mobil 1's and Mobil 1's. Most are not diesel rated, at least not to CH or CI level. The Mobil 1 stuff sold at Supercheap, Autobarn, and Repco in Australia is not the same as Mobil 1 Delvac, which is the sort of oil TonyCRD is talking about. Delvac does not seem to be sold through retail outlets (unless you happen to live in a mining town where one Mobil station is all you have). I've tried to buy it in Sydney and it was only available in drums from the state distributor. If someone knows of another source let me know. Until then I'll stay with Penrite Diesel 5.

[crdjon]

Yep, spend the money on the synthetic, I have settled down to the HPR5 (5-40).

[07CRDKJ]

ok, i've been watching this topic for a while now, there is a lot of personal opinion on what oils to use but this is not something you want to get wrong. At the end of the day you will make your own decision but we need to examine some facts.

The 2.8 crd jeep engine, according to the specs as required by the manufacturer, MUST use an engine oil with API classification CD or higher and ACEA B3,B4 and recommends 10w/40 (although the viscosity can be changed to suit tempereture variations).

A FULL synthetic such as Mobil 1, Valvoline Synpower(which i use) or Castrol Edge is the only way oil companies(like the global giant i work for) can achieve a B3,B4 ACEA rating.

Penrite HPR5 does not have a B3,B4 rating, it is a A3,B3 - which is why it is a SEMI synthetic.
Castrol Magnatec Diesel does not have a B3,B4 rating, it is a A3,B3 - this also is not a FULL synthetic.
Valvoline Synpower 5w/40 has a B3,B4 rating and is a Full synthetic(no i dont work for Valvoline !!).
Castrol Edge 0w/40 has a B3,B4 rating and is a full synthetic.

In essence a FULL synthetic must be used in these engines as it is the only way they can get an additive package in the oil to meet B3,B4 spec.

I'm not telling everyone to suck eggs - i just really hate it when the wrong oils are used

[glend]

OK I'll take the bait. 07CRDKJ, your research is wrong, at least as far as the Penrite goes.

Penrite HPR Diesel 5 is API-CI-4, ACEA B4, and DLD3/DLD2.

Here is the link to the ACEA data:

http://www.kuttenkeuler.de/KkWeb/Web...jectId=1000460

and here is the Penrite product information:

http://www.penriteoil.net/files/2Q8K...DIESEL%205.pdf

I don't recall anyone claiming that Penrite HPR Diesel 5 was a pure synthethic. There are a number of oil base stocks used, Group 3 and upward are classified as synthetic due to the engineering of the product, here are the five classes:

http://www.pecuniary.com/faq/oil-base-stock.html

The online information on Synpower indicates that it is still just a API CF rated oil, from the product sheet..."diesel and turbocharged engines where an API SL, SM or CF oil is recommended".

As a CF it does not afford the protection from soot that is required for a diesel EGR engine.

Oils claiming an API CI-4 performance level will need to have the required:
• Thermal stability
• Soot handling capability
• Acid neutralization ability
• Corrosion protection
• Oxidation stability

Here is the API information on the requirements of CI-4:

The API CI-4 Service category describes oils for use in those high-speed, four-stroke
cycle diesel engines designed to meet 2004 and later exhaust emission standards. These oils are compounded
for use in all applications with diesel fuels ranging in sulfur content up to 0.05% by weight (in other words low sulfur fuel as sold in Australia today). These oils are especially effective at sustaining engine durability where Exhaust Gas Recirculation (EGR) and other exhaust emission componentry may be used. Optimum protection is provided for control of corrosive wear tendencies, low and high temperature stability, soot handling properties, piston deposit control, valvetrain wear, oxidative thickening, foaming and viscosity loss due to shear

I also hate it when the wrong oils are used.