I am hopefully moving down to Phoenix in February to go to UTI, and will be driving back and forth between CO and AZ often, so I figured I'll give Mobil1 a try again, 10w-30 of course. As some of you know, it made my old Grand Am sound like it was going to explode; hopefully my Corolla will be happier. All I want from it is the extended drain capability and of course, super, and I mean super hot weather protection. My plan is to put a batch of Mobil 1 in the car probably tomarrow, then change that out the day before I leave for AZ. I figure that will kind of break my motor in on Mobil 1 and allow me to go extended. I've heard it's not so good to just switch right over and run it out to 10,000 miles, right? In AZ, I'll probably shoot for 6,000 mile OCI. I'm still a bit hesitant because my car consumes about 1 quart evry 2,000 miles, but the sucker spins 3,200 rpm at 75 on the highway, and you've got to rev it at least that high in town to keep up with the locals It's already had Auto-RX about 3-4,000 miles ago, so I hope she's good to go. What do ya'll think?