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What do people think about using Porsche classic oil? My 993 (that I've owned for a year now) will need an oil change soon. It has 63k miles on the odometer and has zero oil leaks. The official Porsche website recommends using Mobile 1 synthetic 10w40 for my 993 but a Porsche dealership service advisor recommends to me to use Porsche classic oil instead. Any advice on this recommendation?
What do people think about using Porsche classic oil? My 993 (that I've owned for a year now) will need an oil change soon. It has 63k miles on the odometer and has zero oil leaks. The official Porsche website recommends using Mobile 1 synthetic 10w40 for my 993 but a Porsche dealership service advisor recommends to me to use Porsche classic oil instead. Any advice on this recommendation?
You car was designed around 15w-40 or 15w-50 oil w/ ~1200ppm+/- ZDDP for normal summer use
10w-40 synthetic is on the low end of what will work as long as it has the required % of ZDDP
for years after the great oil classification upheaval Porsche recommended 0w-40 M1 which has ~1000ppm P &1100ppm Zn, being generous this is barely adequate in weight and ZDDP content
M1 15w-50 has 1200ppm P & 1300ppm Zn, exactly what you want right in the Goldilocks zone
Porsche classic 10w-60 is at or beyond where you want t be in terms of weight and Porsche has declined to publish ZDDP data, independent tests however report 940ppm P & 1100ppm Zn, well below where you want to be
remember that the engine internal clearances were engineered for ~15w-50weight oil and the bearing and rubbing surfaces for ~1200ppm ZDDP+/-
What do people think about using Porsche classic oil? My 993 (that I've owned for a year now) will need an oil change soon. It has 63k miles on the odometer and has zero oil leaks. The official Porsche website recommends using Mobile 1 synthetic 10w40 for my 993 but a Porsche dealership service advisor recommends to me to use Porsche classic oil instead. Any advice on this recommendation?
I just changed the oil on my 97 C2 with Porsche classic 10w-60 and other than the price, the oil is great...It is especially great for California Summers/stop and go, being a little thicker.
I went with Redline 10w-40 after speaking with Dave @Redline about it. I've been using their products for more than a decade in all of my other vehicles, motorcycles, etc. He confirmed that their 10w-40 would be great given my climate and the ZDDP levels being in the sweet spot between what the engine needs and not hurting the catalytic converters. Of course there are several other reasons I run this group V oil over others but if you want to get that deep, then bobistheoilguy.com/forums is the place for you.
They are all 40 weight oil as designated by "W-40". The same applies for (*)W-50 or any other weight oil. The preceding number before the W is just artificial additive nonsense related to "friction inhibitors". Our cars were designed for 40, 50 or 60 weight oil, period. Don't use anything lower (ie 15W-30, etc).
ZDDP can/should be considered but this whole concept of 15W-40 is OK but 5W-40 is bad is one of the most pervasively incorrect things I've read on this forum. Likewise, there is nothing wrong with 5W-50 vs 10W-50. They are both 50 weight oils.
I just changed the oil on my 97 C2 with Porsche classic 10w-60 and other than the price, the oil is great...It is especially great for California Summers/stop and go, being a little thicker.
What factors are you considering when judging the oil as great? Just because its unnecessarily thick? Cause the engine hasn't failed?
This photograph is out of my Porsche Owners Manual, page 93, for my 1995.
The oil specifications are now over twenty-five (25) years old. My Porsche dealer now has the classic oil in stock.
Is it possible technology changed twenty-five (25) years later?
The owners manual also describes what we currently call the"frunk" the "luggage compartment??"
Page 93, original owners manual.
Last edited by Twilightblue28A; 08-05-2021 at 08:23 PM.
They are all 40 weight oil as designated by "W-40". The same applies for (*)W-50 or any other weight oil. The preceding number before the W is just artificial additive nonsense related to "friction inhibitors". Our cars were designed for 40, 50 or 60 weight oil, period. Don't use anything lower (ie 15W-30, etc).
ZDDP can/should be considered but this whole concept of 15W-40 is OK but 5W-40 is bad is one of the most pervasively incorrect things I've read on this forum. Likewise, there is nothing wrong with 5W-50 vs 10W-50. They are both 50 weight oils.
Not entirely true. You really need to look at the technical data sheet when choosing an oil. An oil with say 15w/50 will have a different centistoke value (unit of kinematic viscosity) than another brand or even the same brand but different use with the same advertised viscosity. I alway look at the typical climate I am in, the sort of driving I do and the ZDDP amount. Where I live, Australia, it is very hot in summer and quite mild winters. The best oil that meets all my criteria is Brad Penn 20w/50. It has a nice cSt value when cold (taken at 15 deg C from memory) and a nice numbers when hot (100 deg C ) which is where the measurement is taken.
You really need to look into the data sheet of any oil to make an informed decision that suits and compare the data with other oils of similar viscosity to get an accurate benchmark. The viscosity on the bottle is only a rough guide for the average Joe that doesn’t really know or care about the oil he puts in his truck.
08-05-2021, 10:47 AM
Porsche classic oil vs Mobile 1 10w40 advice?
