[JFP in PA]

Hate to be the bearer of bad tidings, but that is not what has been previously labeled as “Castrol Edge”; it is Castrol Syntec, "updated with Edge technology”. According to their data sheets, “For years, you’ve depended on the power of Castrol SYNTEC to outperform conventional motor oils. Now, we’ve reformulated SYNTEC to outperform even itself."

The original "Edge" product line was never available in 5W-40 weight, and in fact was never available in North America in any weight higher than 10W-30, which is not an appropriate weight for use in any Porsche. The original “Edge” also held different ACEA ratings than this product line does, a further indication it is different as that would require total resubmission and testing under the ACEA testing protocols agreement. There is also a "Pro Edge" product line, which is listed as a "motorsports" product, which does have appropriate weights available, and has been getting some pretty interesting reviews and UoA's; but that is also not yet available in North America through normal distribution channels, although it has been showing up in online retailer’s websites at very stiff prices.

That said, as this new product holds ACEA A3, B3, B4 ratings that the original Syntec held, I would think it is probably a worth successor to the old Syntec 5W-40, but we will wait until we collect enough UoA’s on this newer version of Syntec before broadly suggesting it to customers, which I’m sure is why Charles suggested against using it at this time.