Has anyone ever used Diesel Kleen fuel additive? I picked up a quart at Wal Mart and read the label. It is supposed to be a good fuel stabilizer , plus, it is supposed to raise your octane rating from 3 to 6 points depending on how much you want to put in it. It is also supposed to keep the fuel system clean, eliminate water in the fuel, lubricate better, etc. Sounds like good stuff.