Biodiesel is easier on engines. Field tests indicate that engine life is increased with biodiesel usage. The use of biodiesel and biodiesel blends results in a noticeable change in exhaust odor. The reduction in smell and change of odor are easier on ship workers and pleasure craft boaters. In fact, it's been compared to the smell of French fries.
Users also report no eye irritation.
Since biodiesel is oxygenated, diesel engines have more complete combustion than when using petroleum fuel. The Oil Pollution Act of 1990 increases the civil and criminal penalties for causing spills and for violating marine safety and environmental protection laws. The goal of the biodiesel industry is not to replace petroleum diesel, but to extend its usefulness. Biodiesel is one of several alternative fuels that have a place in the development of a balanced energy policy. The role of biodiesel is to contribute to the longevity and cleanliness of diesel engines.