"Unlike with many biofuels, coconut oil doens't need to be transesterized - mixed with sodium hydroxide and alcohol to change its chemical composition - to run in a diesel engine. Filtered and warmed to temperatures about 25C, coconut oil is a better than satisfactory substitute for "mineral diesel" - it burns more slowly, which produces more even pressure on engine pistons, reducing engine wear, and lubricates the engine more effectively."[Via BoingBoing]
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WorldChanging reports on coconut oil-powered rental cars in Vanuatu: