Yes it is Porsche approved, (A40) except for Cayenne v6. However it only meets MB 229.3Thanks for the tip. Porsche used to recommend their oils, do you know if they still do? I have no doubt they still make an excellent product.
I dug around, and found:I have always stayed with the Mobil 1 Euro 0W40 for my W210, but I have using Syntec in my old SL.
In reading about the reduction in ZDDP in motor oils, I tried to find out how much was in Syntec, but apparently Castrol will not divulge this information.
Mobil has a chart with amounts of Zn and P clearly stated. This is important for old cars, but apparently cars like our W210s don't want high ZDDP because the cats may get fouled up.
Probably going back to Mobil for all our cars.
Thanks for that.I dug around, and found:
Supposedly Castrol 5w-40 hasper 2006 VOA)
M1 0w-40 (per M1 Chart)
Couldn't you use M1 5w-40 TDT...it too has high ZDDPThanks for that.
I use Mobil 1 15W50 on the diesel and will probably on the SL as well. It still has reasonable ZDDP.
I heard Castrol had reduced theirs (along with most oil manufactures) because of needs of newer cars. May have changed since 2006, and that was what I was worried about for use in my '72 SL.
The Mobil info is here