And honestly, what good are the Specs/Certs when those oils causes the problem anyway, as in the case of our Audi Q7 with its Audi dealer specified Castrol Euro oils and 10K mile factory recommended changes? The certified Castrol Euro 5-40 oil caused the stuck oil control rings to begin with....
I'll use the 5w30 Valvoline Restore and Protect and take my chances as we went from using a quart in 400 miles, to zero oil consumption in 3000 miles after a Berrymans B12 piston soak and the switch to Valvoline Restore and Protect, I used the shotgun method on it like that before the engine took a valve out, which the 3.0t is know to do with excessive oil consumption, it will hold the exhaust valve open with carbon deposits that stick in the valve, prevent it from closing and torch the valve.
I'm on the second fill of Valvoline Restore and Protect now and will continue to use on 5000 mile changes with it until they come with Valvoline Restore and Protect in a 40 weight or a Euro spec to keep the oil control rings from sticking again. The power is up along with the fuel mileage and engine smoothness in our Q7. I wouldn't think of going away from it from what I've seen firsthand. I'm also happy to see the low wear metals on the used oil sampling people have done with Valvoline Restore and Protect too. Just as good as the very expensive boutique Euro oils in the same 3.0t engine tells me Valvoline did something right with this stuff.
Oh, and the carbon thats been loaded in my filters is finally starting to settle down and come clean. Yes, the early filter were loaded up with carbon chunks, I suspect from the Berrymans to begin with. The Valvoline Restore and Protect is doing the final cleaning I suspect when the Berryman's B12 did the heavy lifting to immediately free up the oil control rings.