Just got my analysis back from Blackstone. This was older Rotella T Synthetic SL. I'm debating whether to try SM rated RTS, or give M1 0w30 a run. Since I'm heading into summer and will be both highway driving and doing a little rock crawling in the 100+ temps, I'll probably run RTS again and wait until I get an analysis back on the M1 0w30 AFE that's in wifey's PTCruiser right now. You guys have officially corrupted me- oil geekery is more addictive than gambling to my strangely wired brain...