What Oil Do You Use for Diesel Engines?

[oglenelgo]

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Below is a copy of a copy of a supposed Nissan Publication. I cannot give any assurance it is correct so I am not responsible it is it BS.

Bulletin No: MAO4-001
Re: Revised Engine Oil Specification
Applied Model: Y61 & D22
Applied range: ZD3O Engines

Please be advised that the specification for the 011 fill on the ZD30 has been revised. Engine Oils that meet the specification listed below are the only oils that are permitted for use in the ZD30 Engine. 011 Specification: ACEA 83 or JASO DH.1. Nissan strongly recommend that a viscosity rating of 10W40 be used. For specific viscosity relating to ambient temperature ranges please refer to the viscosity chart in the relevant workshop manual.

Note: API CG-4 0118 must never be used In the ZD30 engine.
To support the revision in oil specification, Nissan has developed a
semi-synthetic 10W-40 engine oil that meets all the operational demands of this engine. The revision of the new oil specification is retrospective and will apply to all ZD30 engines.

The oil will be available from Nissan Parts & Accessories in 51t and 200lt Quantities using the following part numbers.
51t- B3005-10W40PK
2001t- B3200..10W40PK

Authorised by:
R Bahn
Manager. Engineering Support
National Service & Engineering Department

NISSAN MOTOR GO.
Locked Bag 1450. Dandenong South, VIC, :3154 Phone. (03) 97974111 Fax. (03) 97974400

PLEASE NOTE
This bulletin does not mention engine oil and filter change frequency.
On page 8-5 of my owners manual engine oil and filter changes are specified for every 15,000kms. On page 8-7 under Severe Conditions it specifies engine oil and filter changes every 7,500 kms.

A mechanic told me that Nissan had issued advice reducing the 15,000 km or 7,500 kms engine oil and filter changes to 10,000 kms or 5,000 kms for severe conditions.

He definitely didn't like the Nissan ZD30 engine or any Nissan for that matter. He defined severe conditions as all normal Australian motoring. He ( cynically? ) suggested something like the idea that in the case of the ZD30 engine, 10,000 kms may be ok if;

- the vehicle was driven constantly for 10,000 kms unloaded;
- never stopped;
- on flat bitumen road;
- engine never exceeded 2,200 RPM or idled more than 30 seconds each hour, and;
- outside air temperature constantly between 15 and 20 degrees C.

Anything different must be considered severe for the ZD30.