Engine - Approved Engine Oils
All0301 1701
Binder - Service Technical Bulletins
This bulletin replaces bulletin Group 1, # 0301, dated 2-28-03.
Engine Oils Approved by Porsche
Date: 5-23-03
Vehicle Type:
Porsche vehicles 1973 - 1998: 911/T, 914, 930, 924/S/T, 928/S/S4/GT, 944/S/T, 964, 968, and 993
Model Year:
1973-1998
Concern:
Engine oils approved by Porsche
Filing:
Remove bulletin Group 1, # 0301, dated 2-28-03 from the Service Technical Bulletin binder and file this bulletin.
Information:
Beginning January 24th, 2001, all Porsche vehicle are now factory filled with 0W-40 Mobil 1 engine oil.
The engine oils listed in this Technical Information are approved for all 1973-1998 Porsche models.
Approved Oil Availability
Porsche approved oil availability varies by global region. Some oils on the following "Approved List" may not be available in certain regions of the North American market, or, may only be available in overseas markets exclusively.
When searching the "Approved List" for a particular manufacturer or brand name, keep in mind that the below listed "Sales Region Codes" are marketed for the North American region:
CDN Canada
N-A North America
USA United States of America
WW World-Wide
Explanations:
Oil Quality and Non-Conventional Basic Oils:
The basic oil and the additives added to it essentially determine the properties of engine oil. Non-conventional basic oils (synthetic or hydrocrack) have more favorable properties as compared to conventional oils (mineral oil). Non-conventional oils are relatively similar with respect to performance, regardless of whether they were produced using the synthetic or hydrocrack process.
In our approved oil list (Type column), the engine oils are identified as follows:
ncp = basic oil not produced conventionally - "non-conventional processing" (synthetic or hydrocrack).
pnp = basic oil with "partially non-conventional processing" (synthetic blend).
cp = basic oil produced conventionally - "conventional processing" (mineral oil). (Engine oil of this quality is no longer approved for Porsche vehicles)
Non-Seasonal "GL" Light Running Oils:
CL oils have good light running properties because of their light low-temperature viscosity as well as a high level of temperature stability. They have a particularly low tendency to evaporate at high temperatures due to their composition. The oils, that meet such high performance requirements, essentially synthetic or hydrocrack oils, can be used without restriction as non-seasonal oils (see approval list, "Type" column).
Non-Seasonal "G" Oils:
"G" oils can be used as non-seasonal oil, but do not have the same light running properties as "GL" oils
Viscosity and Temperature Ranges:
The viscosity of oil depends on the viscosity setting of the oil, identified through the SAE classes and the respective temperature. Engine oils in SAE category 5W-40 or 5W-50 can be used at temperatures down to -25°C (-13°F). Oils of viscosity class 0W-40 can be used at lower temperatures as well.
Temperature ranges of approved engine oils:
Miscibility:
The engine oils approved by Porsche can be mixed to the extent that it is not necessary to flush the engine when the oil is changed, or another type of oil is used. This holds true for mineral oils and synthetic oils.
However, since every brand of oil has a specially adapted unique composition, the same oil should be used for any topping up that might become necessary between oil change intervals, whenever possible.
Sales Region Codes:
The respective sales region is also listed in order to clarify where the approved oils are available. The abbreviations stand for the following, see illustration.
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