According to ILSAC GF-5, that mere spec (GF-5) will offer ample protection. Not talking about sports cars mind you. I'm interested in your view regarding daily driver family cars equipped with a turbo. API SN advises the same protection. http://www.gf-5.com/news_and_events/additional-key-additives/ Excerpt from above LINK... Many vehicle manufacturers are using turbo charging to improve fuel economy while maintaining or even improving performance. Turbo chargers are powered by your vehicle exhaust which means they are exposed to very high temperatures. Without properly formulated engine oils such as ILSAC GF-5, this high temperature can lead to coking deposits of charred oil in the turbo. Lubrizol’s detergent and antioxidant system maintains cleanliness of critical turbocharger parts under the most demanding conditions to maintain performance and longer engine life. Lubrizol has tested our ILSAC GF-5 engine oil additives in the most demanding real world driving in the heat of the deserts of Arizona and the congestion of Las Vegas. Our million-mile plus field trails clearly shows ILSAC GF-5 products are up to the challenge of providing outstanding protection from engine wear. All current and newly introduced engine technologies were tested including the latest GDI (gasoline direct injection) twin turbo changed engine in the 2010 Ford Flex. ILSAC GF-5 will keep your engine running like new and provide protection from wear no matter if you drive an older car or the latest high tech vehicle.