Biodiesel fuel mixtures

A biodiesel fuel mixture composition consisting essentially of a blend of from 5 wt. % to 20 wt. % of at least one biodiesel;

• from 80 wt. % to 95 wt. % of a base petroleum diesel fuel;
• and from 0.050 to 0.400 vol. % 2-ethylhexyl nitrate, wherein
• the base petroleum diesel fuel has
• i) a maximum sulfur content of 15 ppm,
• ii) a maximum polycylic aromatics content of 10 wt %,
• iii) a maximum nitrogen content of 10 ppm,
• iv) a minimum cetane number of 48,
• v) an American Petroleum Institute (API) gravity of 33 to 39,
• vi) a minimum flash point of 130° F., and
• vii) a viscosity @ 40° C., cSt of 2.0 to 4.12;
• the base petroleum diesel fuel has a distillation profile comprising the following properties:
• an initial boiling point of 340° F. to 420° F.,
• T10% (400 to 490° F.),
• T50% (470 to 560° F.),
• T90% (550 to 610° F.), and
• an end point of (580 to 660° F.);
• and
• the fuel mixture comprises 1-25% aromatics by volume;
• wherein the amount of 2-ethylhexyl nitrate is sufficient to reduce on average total particulate matter, to cause the fuel mixture to have no negative impact on the NOx emissions, and to reduce on average at least one of CO emissions, total hydrocarbon emissions or NOx emissions of an engine, said emissions being relative to the emissions from the base petroleum diesel fuel without biodiesel and without 2-ethylhexyl nitrate.