By mid February my Corolla will click to 45,000 miles. I have decided to go with GC 0w-30 and a taller PureOne filter. The tranny will have the pan dropped, t-iv fluid, and ill be installing a magnefine filter to the return line. At 30000 mile's I just did a drain and fill to the at. I might replace the PCV valve. Gonna rotate the tires too.. Anything else I'm missing...Check air filter....I was shopping for oil once at wal mart and one of the service guys came in with a filter that had sucked up a small bird or there was a rats nest in it....