Difference to biodiesel

Vegetable oil is often confounded with biodiesel, actually just as abstract as to confound diesel with pure oil. RME and/or biodiesel is e.g. made from vegetable oil, in addition, of animal fats and used vegetable oils under addition by 10% fossil methanol and further materials like catalysts. So the chemical characteristics of pure vegetable oil and biodiesel are very different.

Disadvantages of Biodiesel compared with vegetable oil:

• consumption rises around the average 8%
• equally the power get lost
• it is high aggressive and attacks lines and seals
• it is hygroscopically (water-attractively - > corrosion of sensitive precision mechanics)
• it isn`t suitable for decentralized production
• it devours tax money
• it is poisonous and water-endangering
• in it's production a handling with dangerous chemicals is required
• it has a worse energy and ecological balance than vegetable oil
• it dilutes the engine oil - > shorter oil change intervals
• it prevents the change toward technology in the nature cycle
• it is an attempt of the oil industry to come into the bio sector
• it decompose itself in nature slower than veg. oil
• in the long term an utilization for the resulting glycerin must be found

Origin: http://www.pflanzenenergie.de/unterschied.html 

All this is not when using vegetable oil.