(Automotive engineering: Fuels, oils, emissions, and other fluids) Bio-diesel is diesel fuel made from biological or natural sources. ▶ diesel cycle
⇒ Some car manufacturers have complained that 100 percent bio-diesel (made from vegetable oil or animal fats) upsets engine management systems. ⇒ New environmental legislation means that, by the end of the year, just under 5 percent
of all diesel must be bio-diesel. ⇒ Brazil mass-produces and exports bio-diesel fuel made with vegetable oil.
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