What oil to use?
Thread Starter
Rennlist Member
Joined: Mar 2017
Posts: 1,073
Likes: 98
That would be A40. They don't spec a single oil as that would be far too restrictive considering these car are sold worldwide. Same as they don't spec a single gasoline, window washer, etc. Any A40 oil has passed the specification Porsche sets and meets standard. I think Gregster summed it up nicely. Use an A40 oil and change frequently.
Thanks all for feedback
Rennlist Member
Joined: Jan 2012
Posts: 2,078
Likes: 161
From: The Great White North
The 'damage' seems to be a function of
- zddp content -- the more there is the more the surface inside the cat can be 'poisoned'
- how much oil is consumed by the motor
- how many times the PCM reads what's going on inside the cat; that is, a low-efficiency reading regarding ability to store O may be returned which will in-turn, change the mix settings...
Still, the S rating, whole-fleet approved, higher ZDDP levels associated with 40 ratings makes it a good choice. Except in the cold!
Team Owner
Joined: Aug 2005
Posts: 28,416
Likes: 1,611
From: Cambridge Ontario Canada
I was under the impression that even the rotalla and other diesel oils have also been reformulated with removed zddp. This is why I no longer put rotella in my car and stick with kendall racing or brad penn racing.
( I was also under the impression high zddp oils had to be labelled " racing oils" now not designed for street use , but alas \I may have dreamnt that up )
but I am talking strictly for air cooled engines now.
( I was also under the impression high zddp oils had to be labelled " racing oils" now not designed for street use , but alas \I may have dreamnt that up )
but I am talking strictly for air cooled engines now.
