Ok, I cant decide if I want to take the plunge and go with a synthetic in my Honda Ridgeline or stick with dino. Its a 2006 and has 62,000 miles, I follow the MM and it ususlly goes to about 7100-7500 miles for an oci. 80% highway miles at 60 mph and the other 10% is city driving on the weekends. I have considered all different kinds and weights, but I'm gonna stick with the 5w20 it recommends.My dino choices are Castrol, PYB, and VWB. My synthetic choices are Mobil 1, Castrol Syntec, or Valvoline Synpower. The main thing I undecided is on to syntheic or not, I need some expert opinions.