dieselenthusiast wrote:
I haven’t done that much research on it. But from my understanding, the 2009 Volkswagen Jetta TDI is biodiesel compatible and can run on a maximum of 5% biodiesel according to the owners manual??? I’m sure it can run on a much higher blend of bio, but wanted to hear if anyone knew for sure?
VW is paranoid and won't warranty higher levels for fear of someone's home brew bio having a chunk of chicken beak in it, that gets past a hole in the fuel filter and clogs an injector, causing a catastrophic failure. No diesel vehicle manufacturer warranties for higher than 5% (including Chrysler with the CRD Liberty). Cummins on the other hand will warranty their engines for B20 that meets ASTM (which doesn't mean much in this context since they aren't responsible for warrantying engine failures in Dodge trucks).
The argument is that bio isn't made to a uniform quality standard (not technically true now, since most commercially made stuff meets ASTM specs). That, and they all look for any excuse to void warranties.
I had to take my 06 Jetta TDI in for a recall item (plastic headlight clips, go figure) last week and got to check out the new ones. The new 2.0 engine is more potent than my 1.9 (over 230 foot pounds of torque is pretty impressive for a small family car). I'm hoping diesel prices get under control (perhaps its time to tax fuel exports, creating a disincentive for refining fuel here produced from domestic sources then shipping it overseas in order to artificially inflate prices). The new VW TDI's are just wonderful cars all the way around, the only thing holding them back from making a big leap in market share is diesel prices.