I don't know which model year Toyota went to the 10K intervals, but my 2013 Tundra is the same, so they switched awhile ago and you're not a guinea pig. Mine came from the factory with 100% synthetic oil and 10K recommended oil change intervals. I'm OK with it, I'm at 55K now and visually the oil is still clear as can be at the 10K intervals. I was surprised at how "thin" the SAE 0W-20 oil is, very different from old style oil. You sure don't need to fool with summer vs winter oil weights anymore.
