Now Silicon Valley startup Solazyme [NSDQ:SZYM] is testing diesel fuel derived from refining renewable oils--produced by specialized algae--in two Volkswagen turbodiesel models.

Separately, they urged more in-use testing of engines to verify the gains, and increased use of renewable diesel, which is chemically similar to petroleum diesel, but cleaner.

ABSTRACT The emissions legislation in the US and Europe introduce the need for the application of diesel particulate filters (DPF) in most Diesel vehicles. In order to fulfill future OBD legislations, ...