I have another question regarding fuel. A friend of mine owns several service stations and has informed me that Kero K1 is virtually the same as high cetane low sulpher Diesel #1. According to him the oil companies are trying to conserve costs and middle distillates like K1 and D1 only differ by the dye added so that DOT can burn a truck driver for using untaxed fuel on the road. Has anyone else heard of this? I have looked at the milspecs on JP5, JP8, D1 and K1. The JP5 and D1 are very close.