You can run biodiesel engines on filtered coconut oil!
Vanuatan entrepreneur Tony Deamer has adapted his fleet of rental cars to run on coconut oil, a plentiful local commodity. 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. Deamer runs most of his vehicles on a mixture of 85% coconut oil and 15% kerosene, but has demonstrated that modified diesel engines run filtered coconut oil quite happily.
