I'm not sure that you'll see anything marked premium diesel. I've been buying Texaco for the last 2 weeks from a station that only sells to cars and small trucks. The price is also higher than truck stops. I've seen a noticealbe difference in mpg and fewer regens. I'll keep on looking for some specific information abound different diesel brands and their specifications. QT calls their diesel top tier.
One thing for sure, there is a big difference in diesel fuels from brand to brand or refiner to refiner. If I fuel up at top stops that label their diesel min.40 cetane, my mpg goes down and regens up.
So, I'll keep on looking

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7.5 3500QC 6.7CTD 68RFE Build date June 2007
Superchips tuner 3808, Boost/EGT Laser Gauge, Airaid cold intake