Biofuel for car use.
Petroleum diesel and gasoline consist of blends of hundreds of different hydrocarbon chains. Many of these are toxic, volatile compounds such as benzene, toluene, and xylenes, which are responsible for the health hazards and pollution associated with combustion of petroleum-based fuels. Carbon monoxide, nitrogen oxides sulfur oxides and particulates, are other specific emissions of concern. A key environmental benefit of using biofuels as an additive to petroleum-based transportation fuels is a reduction in these harmful emissions.

On another note, ethanol as a transportation fuel can be utilized as a partial or total alternative for conventional petroleum diesel. For urban regions that don't meet the standards of a clean air, gasoline containing 10% ethanol (E10) is utilized. The extensive use of E10 is encouraged in some states. The use of E10 can be used on all gasoline operated vehicles without making massive modification to their engines.

When biodiesel is combined with petroleum diesel, it brings in a fuel that is compatible with diesel engines, reduce imported petroleum needs and decrease toxic emissions. A combination of 20% bio- and SO%- conventional diesel will greatly lessen carcinogenic emissions and gases which can worsen global warming. Lower-level biodiesel blends, such as 2% bio-and 98% diesel or 5% bio­and 95% diesel, are turning out to be increasingly common and widely used by the public as they become more aware of the many benefits.

Biodiesel is now widely used in the United States, Canada, Thailand, and many countries in Europe. It is advisable to consult the manufacturer's recommendations and information about the use of biodiesel. Here are some of the important considerations in utilizing biodiesel in your engines.
Rubber Seals and Hoses
Almost all pre-1994 automobiles and several later model vehicles have fuel lines that are not compatible with biodiesel. These rubber fuel system components, such as hoses and pump seals will be gradually degraded with the utilization of biodiesel.
Fuel Filter Clogging
Biodiesel can liberate deposits mounted up on pipes and tank walls from previous traditional diesel fuel, thus primarily causing fuel filter clogs when used for the first time. Vehicle owners must change the filter shortly after trying on a full tank of biodiesel.
The paint on your automobile may dissolve with the use of biodiesel in due course. This incident can be prevented by immediately wiping off or washing with small amount of soap and water.
Cold Weather
At around 32°F or higher, biodiesel crystallizes. The vehicle will not start when biodiesel freezes your fuel system and injection pump. In regions with colder climates, crystallization can be prevented with adding of heating elements or insulation to the fuel systems.
Uninformed Mechanics
Mechanics that are not knowledgeable and familiar with biodiesel might misdiagnosed not related problems as being brought about by biodiesel and perform "repairs" in the fuel system that are not necessary and expensive. Locate the nearest biodiesel-friendly mechanic before actually needing one. A second opinion from an expert mechanic is also suggested before permitting any expensive repairs to be done.
Overall, the utilization of biodiesel can not be the primary reason for maintenance issues and concerns. A lot of newer vehicles have compatible components that will accept biofuels readily. Nevertheless it is still best to check your owner's manual or consult your vehicle manufacturers for recommendations and more specific information.