The oil is good. You really cant go wrong with any of the well known oils today if your using the correct viscosity and type called for by your vehicles manufacture.
I'd change the oil every 6K miles if you drive both city and highway in the Mazda. I wouldn't be afraid to use Valvoline, Kendall, Supertech, Quaker State and so on and so forth. I'd probably use Valvoline Maxlife myself as it is a proven high mileage oil.