I heard some negatives about Power Service a few years back and stopped using it. I suspect that somebody used their "Diesel 911" as a regular additive instead of a fix for gelled fuel, and they got a bad rap as a result. Many gas stations around town had nothing but 911 on the shelf, and for quite a while.
I run stanadyne if anything. I know many of the truckers are running 2-stroke oil. But one guy's experience is rarely going to get you a conclusive answer on something like this.
