Based on some recent UOAs on here, I'd consider trying out Castrol Syntec blend if I were you! I honestly don't know how this oil does it, but the few reports we've seen on here recently all look good and this oil doesn't appear to thin out either, even in 5w30 form. It just showed a real good 5k report in a Toyota too.
It almost appears as if Castrol's Syntec blend is better than their US made Syntec full synthetic! Of course, we'd need many more UOAs on both oils to come to this conclusion though.
So for 3-5k drains, this might be another good alternative.