Bob: IM S6 posted:I always used Brad Penn oil in my previous speedsters. I figured the zinc content had to help, and many of the wise ones on here always recommended it.
Now, I let the shop change the eleven liters of oil in my IM6. And they use a special, secret Germanic oil that only 911 owners (or those with a 911 engine) know about.
Which Brad Penn oil? There is the green, there is the Penngrade 1. 10/40 I presume?