Originally Posted By: NewYorkBuck
I dont have any first hand experience with Redline, but I have this to offer. I own a Porsche 911TT, and on the Porsche boards there is a guru there who knows more about my car than anyone Ive ever seen. He has come right out and stated he does not like Redline oils as he has had two valve train related failures using Redline.
FWIW, he recommends M1 Delvac and TDT in our cars, and 300V "if you want to spend a lot of money on an oil change."
Delvac 1 is indeed a popular choice. Doug Hillary, who has a great deal of Porsche experience is a big fan of that lubricant.