Greasecar has a product it calls the Vegetable Oil Conversion System, which can convert your diesel car or truck to run on vegetable oil in any climate. It's a DIY kit, so this certainly isn't for people who don't know a spark plug from a fan belt.
Different vehicles have different types of kits, with prices varying from $995 for a 13-gallon cylinder tank to $2,350 for a 40-gallon tread plate tank. If you're game, you need to find out whether your vehicle model is available for this kind of modification. We'll also throw in a disclaimer here that you do this at your own risk and depending on the laws of your country.
(Source: Crave Asia)