With the price of gas on the steady incline, more consumers have taken interest in alternative fuels, even going as far as purchasing vehicles specifically made to support them. Biodiesel is one such fuel that powers vehicles like the 2005 Volkswagen TDI and the 2005 Dodge RAM 2500 Pickup. While this domestically produced, renewable fuel solution is supposed to be safer for the environment, many questions have been raised about its effectiveness. Consumers have been warned that it will leave behind deposits from petrodiesel. These deposits can then clog the fuel filter which may eventually prevent the vehicle from running.According to one consumer, B20 is the preferred choice over B100 (100% biodiesel) which often requires specific engine modifications to prevent maintenance and performance issues. The consumer went on to explain that B20 even blended nicely with the B99 he put into the tank previously, giving great performance and mileage. Although the jury is still out on the overall efficiency of this alternative fuel, its good to know that some of us are enjoying the benefits.