The short answer is YES. Fuel viscosity has a significant effect on the dynamic advance system just as you suggested. If, however, it has that effect from an alternative fuel, that means that your pump is significantly out of adjustment for pump diesel and the same gains can be had using pump fuel and having the pump adjusted properly.
Motor oil trans fluid and gas are much higher BTU value fuels then desulferized diesel. I burn all these in a waste oil heater and when the heater is at the same setting the heat output is very different. So different that the flue pipe can double in temperature. Also the addition of gas changes the flame front temperature and ignition temp. Do you have an exhaust temp gauge?
DUDE, RABBITONROIDS! you just have to give us a formula for this stuff you are running iot has been said more than once on this forum already, that your fuel gives wicked gnarly power and has excellent lubrication. So how bout' it??? let us in on your little secret. Or better yet patent the formula and sell it to racers etc. for a mint you always talk about how you don't have money well here is your chance at something incredibe. Hell, I know that I'd buy the stuff from ya.