Comparison: Bio-diesel vs. Diesel
Diesel and bio-diesel both provide some advantages in comparison to using regular gasoline, but which of these two options is the better choice? Read on for a detailed comparison of the benefits offered by these fuel types…
ENVIRONMENTAL: For the most part, bio-diesel is considered to be environmentally preferable to conventional fuel; according to the Environmental Protection Agency website, biodiesel produces fewer emissions of most types, decreases waste, and is easier to clean up when spilled (because it is biodegradable and non-toxic). However, the EPA indicates that it is still unclear as to whether biodiesel produces more or less nitrogen oxides.
FUEL COST: Regular diesel is generally preferable to bio-diesel with regard to cost. According to fueleconomy.gov, biodiesel presently costs more and provides slightly lower fuel efficiency. It is possible that this will change in the future. An entry on biodiesel at Wikipedia.org lists a few reasons supporting this possibility, and points out that biodiesel is sold less expensively than conventional fuel in Germany.
VEHICLES: Conventional fuel can be used in more vehicles than bio-diesel, but it is possible to use biodiesel in more automobiles than most other alternative fuels. According to fueleconomy.gov, it can be used in most newer diesel engines, although some warranties are voided by using pure biodiesel or blends with greater than five percent. EPA.gov indicates that vehicles older than fifteen years are more likely to need conversion work before they can run on it; according to wikipedia.org, older Mercedes cars are often converted so they can run on biodiesel.
Overall, bio-diesel is better for the environment and may eventually become cheaper, but regular diesel is less expensive and can be used in more vehicles. Both offer greater fuel efficiency in comparison to gasoline powered vehicles.