I am a bit hesitant to start this thread. Time will tell if I succeeded.
Here we go. Looking for an oil that will suit this type of engine in my driving conditions and hopefully benefit folks with GT2, GT3, 996/997TT’s and alike who actually store their rides during winter months and enjoy them over the summer. Oil changed every 6 months regardless of mileage so overall cost of oil should not be a main factor.
I would also like to exclude racing/tracking applications. Just daily driven (hard driven if necessary) cars that we want to have running “forever” just like that proverbial old Toyota commercial with 700KMi on it.
Porsche requires oils between 0w40 and 5W50 (see Widman’s graph your oil site, BTW: great stuff, much appreciated!) to run variocams properly. I have no need for 0W40 oils, I don’t drive in winter. 5W40 is definitely OK, however given that I typically start my car in +5*C (40*F) worst case a question comes why can’t I use 10W40 grade for my summer fill.
We all know that so called Euro oils 5W40 shear to 30 grade relatively quickly. There are also opinions that 10W40 handles the job much better from the UOA and engine wear perspective. I know some of you will say “just follow your manufacturer…”. Indeed I am not trying to improve upon Porsche engineers; I am trying to select a narrower spec oil that will benefit from not covering a wide aspect of driving conditions that all season cars encounter. Such oil obviously is not on A40 list that’s why I am seeking advice here.
So, it must be ACEA A3/B3/B4 as minimum. Have HTHS > 3.5, possibly meet or exceed 229.5 and other similar requirements.
I exclude motorcycle oils as they typically have high ZDDP levels contributing to piston deposits and detrimental to cats.
Some Diesel oils would qualify just all right I think.
Potentially 40 grade racing oils, however 6 mos. OCI may not be optimal in this case.
Unfortunately the 10W40 grade isn’t common nowadays. Redline, Amsoil, Castrol 10W40 and a few Diesel oils to chose from. Mobil HM 10W40 is not available where I live or at least I didn’t come across it yet.
There has been many similar threads such as “Why we hate CJ-4/SM…”, I would like to keep this on a constructive and positive note.
Any cons or pros of going with 10W40 in these water cooled engines?
Please respond with similar experience, thoughts or ideas. No brand X better than brand Y please. That’s not what I am looking for.
Cheers,
L
Here we go. Looking for an oil that will suit this type of engine in my driving conditions and hopefully benefit folks with GT2, GT3, 996/997TT’s and alike who actually store their rides during winter months and enjoy them over the summer. Oil changed every 6 months regardless of mileage so overall cost of oil should not be a main factor.
I would also like to exclude racing/tracking applications. Just daily driven (hard driven if necessary) cars that we want to have running “forever” just like that proverbial old Toyota commercial with 700KMi on it.
Porsche requires oils between 0w40 and 5W50 (see Widman’s graph your oil site, BTW: great stuff, much appreciated!) to run variocams properly. I have no need for 0W40 oils, I don’t drive in winter. 5W40 is definitely OK, however given that I typically start my car in +5*C (40*F) worst case a question comes why can’t I use 10W40 grade for my summer fill.
We all know that so called Euro oils 5W40 shear to 30 grade relatively quickly. There are also opinions that 10W40 handles the job much better from the UOA and engine wear perspective. I know some of you will say “just follow your manufacturer…”. Indeed I am not trying to improve upon Porsche engineers; I am trying to select a narrower spec oil that will benefit from not covering a wide aspect of driving conditions that all season cars encounter. Such oil obviously is not on A40 list that’s why I am seeking advice here.
So, it must be ACEA A3/B3/B4 as minimum. Have HTHS > 3.5, possibly meet or exceed 229.5 and other similar requirements.
I exclude motorcycle oils as they typically have high ZDDP levels contributing to piston deposits and detrimental to cats.
Some Diesel oils would qualify just all right I think.
Potentially 40 grade racing oils, however 6 mos. OCI may not be optimal in this case.
Unfortunately the 10W40 grade isn’t common nowadays. Redline, Amsoil, Castrol 10W40 and a few Diesel oils to chose from. Mobil HM 10W40 is not available where I live or at least I didn’t come across it yet.
There has been many similar threads such as “Why we hate CJ-4/SM…”, I would like to keep this on a constructive and positive note.
Any cons or pros of going with 10W40 in these water cooled engines?
Please respond with similar experience, thoughts or ideas. No brand X better than brand Y please. That’s not what I am looking for.
Cheers,
L