Waxes in Biodiesal? Bring back the Oil Powered Steam engine!

I am reading here that the problem with Biodeisal is that the Parrifin or wax has to be removed to make it viable. Now how does Willie Nelson get away with it?

I understand that the railroad in Ceder Point is Oil Fired…

http://www.cplerr.com/engineroster.html

Paraffin can be found in natural petroleum too. Remember that all crude oils are not alike. As a rule of thumb, crude oil with a higher percentage of paraffin is generally more suited to be refined into more lube oils from the lower range distillates.

Well that would explain why the Oil in Penn. state is used for lubercation…

and the oil in texas is used for fuel…

The UP turbine locomotive “Big Blow” used “Bunker C” grade Oil which was a low grade slop as you can get…

Now the question is distilling the pariffin really worth the cost?