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Recommended Oil Weight For Warm Weather Climate


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Does anyone have info on Porsche's currently recommended oil weights for warm weather climates? I believe it used to be 5W-30 but seem to recall seeing a post on PPBB about a TSB that suggested a lower viscosity (0W-30). Unfortunately, I can't seem to locate the post in the archives on PPBB.

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The TSB for "Porsche Approved Oils" is 8 pages long. Most of the common ones are in the list below:

Mobil 1 0W-40 ncp GL (factory fill)

Mobil 1 5W-40 ncp GL

Mobil 1 5W-50 ncp GL

Castrol Syntec 5W-50 5W-50 ncp G

Castrol Syntec 5W-40 5W-40 ncp GL

Mobil 1 Tri-Synthetic Formula 0W-40 ncp GL

Texaco Havoline Synthetic 5W-40 ncp GL

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The TSB for "Porsche Approved Oils" is 8 pages long. Most of the common ones are in the list below:

Mobil 1 0W-40 ncp GL (factory fill)

Mobil 1 5W-40 ncp GL

Mobil 1 5W-50 ncp GL

Castrol Syntec 5W-50 5W-50 ncp G

Castrol Syntec 5W-40 5W-40 ncp GL

Mobil 1 Tri-Synthetic Formula 0W-40 ncp GL

Texaco Havoline Synthetic 5W-40 ncp GL

Hi, Loren. What is the significance of "ncp G" and "ncp GL"? Thanks.

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ncp oils are synthetic (or "non-conventional processing") oils. GL oils have good light running properties because of their light low-temperature viscosity as well as a high level of temperature stability. G rated oils can be used as non-seasonal oil, but do not have the same light running properties as "GL" oils.

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ncp oils are synthetic (or "non-conventional processing") oils. GL oils have good light running properties because of their light low-temperature viscosity as well as a high level of temperature stability. G rated oils can be used as non-seasonal oil, but do not have the same light running properties as "GL" oils.

Loren, would it be possible to tell from TSB what Mobil 1 weight would be recommended for "severe duty" (oil changes more frequently due to lots of city driving, more cold starts, etc.) in a warm weather climate.

Failing that, is the TSB available online anywhere?

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ncp oils are synthetic (or "non-conventional processing") oils. GL oils have good light running properties because of their light low-temperature viscosity as well as a high level of temperature stability. G rated oils can be used as non-seasonal oil, but do not have the same light running properties as "GL" oils. 

 

Loren, would it be possible to tell from TSB what Mobil 1 weight would be recommended for "severe duty" (oil changes more frequently due to lots of city driving, more cold starts, etc.) in a warm weather climate.

Failing that, is the TSB available online anywhere?

Porsche's approved list does not make any recommendations for what other car makers call "severe duty". All of Porsche's approved oil are high quality severe duty oils. Only hydrocracked or synthetic oils are approved by Porsche.

Temperature wise Porsche states:

Above -12° F. (-25° C): all oils approved by Porsche for the vehicle type to be considered

Below -12° F. (-25° C:: all oils approved by Porsche for the vehicle type to be considered which have the SAE class OW at lower temperatures.

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