Back in 2004, several automakers got together to create a more pure form of gasoline to meet strict standards set by the U.S. Environmental Protection Agency (EPA), now known as Top Tier gasoline.

Before lower-grade gas pumps can be used again, companies like Tank Cleaning Industrial will have to clean them out.

There are very few, very specific instances that would require the labor-intensive and expensive cleaning of a car's fuel tank. In fact, most cars made in the last 20 or so years should hardly require ...

A new product from Algae-X International is said to remove sludge and water from smaller diesel engines, such as those found on trucks, generators and farm equipment, while optimizing fuel quality.