Walter,
Parece que os motores a diesel podem sim usar o B100, pelo menos Segundo o dep. de energia dos US, Eles dizem que pode usar sim. Mas tem que prestar atençao em algums detalhes. "engine warranties, low-temperature gelling, solvency/cleaning effect if regular diesel was previously used, and microbial contamination". Ou seja, pode ? Pode sim, mas o buraco é mais em baixo.
Alternative Fuels and Advanced Vehicles Data Center: B20 and B100: Alternative Fuels
B100
B100 or other high-level biodiesel blends can be used in some engines built since 1994 with biodiesel-compatible material for parts such as hoses and gaskets. However, as biodiesel blend levels increase significantly beyond B20, a number of concerns come into play. Users must be aware of lower energy content per gallon and potential issues with impact on engine warranties, low-temperature gelling, solvency/cleaning effect if regular diesel was previously used, and microbial contamination. To avoid engine operational problems, pure biodiesel (B100) must meet the requirements of ASTM D6751-09, Standard Specification for Biodiesel Fuel (B100) Blend Stock for Distillate Fuels (
summary of requirements).