911 Turbo AWD F6-3600cc 3.6L SOHC Twin Turbo (1997)
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.
