not any production vehicles warrantied for burning straight vegetable oil, although Deutz offers a tractor and John Deere are both known to be in late stages of engine development. There is a German grapeseed oil fuel standard DIN 51605. At this point straight vegetable oil is only a niche market although the market segment in Germany is rapidly growing with large haulage vehicle fleets adopting the fuel, largely for economic reasons. A growing number of decentralised oil mills provide a large part of this fuel. Vegetable oil refining - Vegetable oil can be used as feedstock for an oil refinery. There it can be transformed into fuel by hydrocracking (which breaks big molecules into smaller ones using hydrogen) or hydrogenation (which adds hydrogen to molecules). These methods can produce gasoline, diesel, or propane. Some commercial examples of vegetable oil refining are NExBTL, H-Bio, and the ConocoPhilips Process. The transition can start with biodiesel, vegetable oil refining, and vegetable oil blends, since these technologies do not require the capital outlay of converting an engine to run on vegetable oils. Because it costs to convert vegetable oil into biodiesel it is expected that vegetable oil will always be cheaper than biodiesel. After there are production cars that can use straight vegetable oil and a standard type available at gas stations, consumers will probably choose straight vegetable oil to save money. So the transition to vegetable oil can happen gradually. Electricity generation Other methods, like nuclear power, fusion power, wind power and solar power, may provide cheaper electricity, so vegetable oil may only be used in peaking power plants and small power plants, as diesel is limited to today. There is at least one 5 MW power plant that runs on biodiesel. MAN B&W Diesel, Wärtsilä and other companies produce engines suitable for power generation that can be fueled with pure plant oils. Market, cost, price, and taxes In Europe, straight vegetable oil (SVO) costs 150 pence/litre at most supermarkets and somewhat less when bought in bulk direct from the manufacturers whereas diesel costs at least 130 pence per litre (in the UK ) to well over that (depends on the year, 1.4 euro is the current market price in central Europe). In the USA, diesel costs about 0,6 $ per liter and the cheapest SVO costs about the same, with more expensive oils costing more than that (up to $7 per gallon).