A Portuguese oil company, Galp Energia, plans to announce Wednesday that it is building a 6,500-barrel-a-day plant to make diesel fuel from vegetable oils using a method akin to refining oil. The ...

Researchers in Nigeria say water in diesel emulsions could significantly reduce nitrogen oxides and particulate emissions without major engine redesign. The approach may also preserve, and sometimes ...

A lot of diesel vehicle drivers might take certain things about their fuel for granted. We might gripe when its price increases and reminisce about just how cheap it used to be a relatively short time ...

Most people pump diesel without thinking about what's in the nozzle, but the stuff has a long journey before it hits your fuel tank. Diesel doesn't magically come out from underground — it's ...