I've decided to use Mobil 1 5W-30 in my 2006 Rav4 269 hp V6.
Mobile 1 is the largest selling sythetic oil so it"ll be easy to find.
I have been using Quaker State 10W-40 in my previous vehicles with good success. None of them have ever burned oil.
I've decided to go sythetic in the future.