Change History

I went ansd dug out my report, made a JPEG, loaded it to tinypic, and linked it here. All because you wont trust me to have the facts, even if i dont reveal everything.

Here are the requirements for A40:

[url=http://i58.tinypic.com/o91ms2.jpg]A40 reauirements[/url]

Point by point:

A40 doesn't specify any rating...

--> yes it does, see above

While all A40 oils have the A3/B4 classification not all A3/B4 classified oils are A40.

--> No shit sherlock, they need to meet the other requirements and Pay Porsche.

To me this strongly suggests that the A3/B4 classification is so loose, so open, so easy to receive, that all oils so classified are not in fact close the same and therefore one can't just rely upon that classification when selecting an oil.

--> What it suggests to you is irrelevant. on HTHS/ it is by no means loose. It means > 3.6 The absolute worst performing A3/B4 oil ont he market w/r/t HTHS is the one they recommend with a sticker, for which they are paid. in oil.

But of course some owners believe they know more about what's a suitable oil than Porsche.

--> i certainly dont say that. But i do say i know more about my environment, how my car is used, and i have less pressure to comply with CAFE.

You make (in error) the assumption I worry about A40.

--> I did not. I said Porsche knows what the cars need and specifies high HTHS
Porsche has the most to lose by specifying a subpar oil, any lubricant, or vital fluid for its fleet of vehicles.

-->No, it simply cannot blow up within 50k miles or 4 years, quite a low bar. The IMS fiasco shows that they dont pay too much attention to the reputation from technical folks

I would worry if I decided to ignore the A40 approved oils for then I would have to either rely upon my ability to select a suitable oil

--> yes, that is true. I don't mean to put capabilities in your brain, but you have more facts than Porsche has, if you begin with their own facts.

But for the online oil experts just the presence of A40 is reason enough to exclude the oil.

--> ok, now i get the sarcasm. But we should take any type approval for what it is. Since i was once in that game, i know quite well. its not bad, you just need to understand the motivations.

Grant

Here are the requirements for A40:

[url=http://i58.tinypic.com/o91ms2.jpg]A40 reauirements[/url]

Point by point:

A40 doesn't specify any rating...

--> yes it does, see above

While all A40 oils have the A3/B4 classification not all A3/B4 classified oils are A40.

--> No shit sherlock, they need to meet the other requirements and Pay Porsche.

To me this strongly suggests that the A3/B4 classification is so loose, so open, so easy to receive, that all oils so classified are not in fact close the same and therefore one can't just rely upon that classification when selecting an oil.

--> What it suggests to you is irrelevant. on HTHS/ it is by no means loose. It means > 3.6 The absolute worst performing A3/B4 oil ont he market w/r/t HTHS is the one they recommend with a sticker, for which they are paid. in oil.

But of course some owners believe they know more about what's a suitable oil than Porsche.

--> i certainly dont say that. But i do say i know more about my environment, how my car is used, and i have less pressure to comply with CAFE.

You make (in error) the assumption I worry about A40.

--> I did not. I said Porsche knows what the cars need and specifies high HTHS
Porsche has the most to lose by specifying a subpar oil, any lubricant, or vital fluid for its fleet of vehicles.

-->No, it simply cannot blow up within 50k miles or 4 years, quite a low bar. The IMS fiasco shows that they dont pay too much attention to the reputation from technical folks

I would worry if I decided to ignore the A40 approved oils for then I would have to either rely upon my ability to select a suitable oil

--> yes, that is true. I don't mean to put capabilities in your brain, but you have more facts than Porsche has, if you begin with their own facts.

But for the online oil experts just the presence of A40 is reason enough to exclude the oil.

--> ok, now i get the sarcasm. But we should take any type approval for what it is. Since i was once in that game, i know quite well. its not bad, you just need to understand the motivations.

Grant