I recently acquired a 2005 4Runner with the 1GR-FE 4.0 V6 with VVTi. I like to run the thinnest possible oil in my vehicles, especially in the winter. I've read that Toyota recommends 0W-20 for the later revision of this motor with dual VVTi. I was wondering if there's any risk of running 0W-20 in my motor. What brands of 0W-20 are best? Also, would a moly MoS2 engine oil additive be helpful to reduce friction and wear? Thanks!