Kerosene has the same cetane value as #2 diesel, at least according to the fuel gurus at the info-pop site.

Jadavis is correct that it lacks lubricity and that as little as 2% vegetable oil will overcome this shortcoming. Marvel Mystery oil or many other lubricants could also be used at a lesser rate.

I get K1 (kerosene) at the local Sunoco station for $2.499/gal.