Fuel for individuals is regulated in NL.
Public Utilities Board, Petroleum Pricing:
http://www.pub.nf.ca/ppoprices.htm When you click on the motor fuel link look to the far right column for diesel. You will also see where you get the best price.
& BTW many transport trucks run on diesel. How anyone down there ever thinks there would be any problems with diesel when most goods are transported via 18-wheelers/transport trucks, I just don't know.
Highway driving will have diesel. Big cities may have diesel only at selected locations - like those gas statiions close to the major highway routes. But folks always ask about rural. Just eeek lack of logic from my driving experience, that one.
:C