This, from a engine platform that VW says is only rated for B5. Two of these vehicles have been running B100 for over 100,000 miles with no fuel related breakdowns. We like the safe and slow method, as we have done here with our other cars and trucks.Īs of this date, we have three VW TDI’s running biodiesel at either B50 or B80 blends, or straight B100 blends. Anything B05 - B10 is not going to cause damage although it is not approved. Anything above that is 'Use at your own risk'. If you have other reasons, use up to 5 with Vws blessing. In some of the VW’s with tank mounted fuel pumps, this still could cause a problem, or even a pump failure. Looking on other forums (NOT this one) it appears that they run okay on vegetable oil. The general train of thought is that anything above 2 is a waste if you are only doing it for lubricity purposes. This sounds okay in theory, but nobody here has ever tested it. Again, using lower blends makes this happen over a longer time period, and helps prevent you from being stranded on the side of the road with a stalled vehicle.Īn alternative solution, albeit untested, would be to unhook your fuel line going into your engine and run straight B100 until the fuel line pumped clear fuel. There is still a good amount of particulate matter to be pulled from the fuel system. Any diesel vehicle can run on B100 when ambient temperatures aren’t too low, but year-round operation in colder climates can be achieved with an upgrade to a vehicle’s fuel tank. The next photo shows the fuel that was pulled from the dirty side of the fuel filter and the soot that remains in the fuel. Fuel from the “dirty” side of the fuel filter
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