Web Site said:
REFORMULATED FOR EVEN BETTER PERFORMANCE: INTRODUCING CASTROL EDGE WITH SYNTEC POWER TECHNOLOGY.
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:
In extreme tests, Castrol EDGE with SYNTEC Power Technology maintained maximum horsepower 30% longer than Castrol SYNTEC [1]
New, powerful dispersant molecule suspends particles to fight power-robbing deposits [2]
Improved formula continues to keep the engine running at peak power longer [1]
Castrol EDGE with SYNTEC Power Technology performs better than conventional oil in the toughest industry tests
Superior protection against deposits. Corrosive particles such as acid, soot and oxidized fuel fragments can cause costly damage to critical engine parts
Powerful Additive Package that neutralizes corrosive particles, preventing them from grouping together and forming deposits.
Neutralizes acids in your engine that can cause rust and corrosion on vital engine parts such as cylinders, bearings and hydraulic valve lifters
Meets the world's toughest industry gasoline engine protection requirements [3]
Provides Stability & Endurance under extreme conditions (heat, load, speed) that can cause conventional oils to break down
Delivers the ultimate performance under high-temperature conditions: unsurpassed protection against volatility burn-off and viscosity increase
Can be used with confidence in every gasoline engine passenger car, new or old, regardless of oil previously used [4]
Fully compatible with all conventional and synthetic oils
When I asked Castrol your question via the live chat this is what they said:
You are now chatting with 'AL'
AL: Thank you for contacting Castrol. How may we assist you today?
John: Fine Thank you. Is CASTROL EDGE WITH SYNTEC approved for Porsche?
AL: What is the year of your Porsche?
AL: And model?
John: 2006 Porsche Carrera
AL: Please hold for one moment while I look into that for you.
John: Thank you
AL: Unfortunately we do not have a listing for your model. However all other models show an API* recommendation that indicates any formula can be used. Please confirm with Porsche if this is the same for the Carrera.
AL: Is there anything else we can assist you with today?
John: Thanks
AL: Have a great day! Castrol appreciates your business!
Chat session has been terminated by the site operator.