hi all. I've been running my '99 a4 avant 2.5 v6 on 50/50 biodiesel mix since april, covered around 6000 miles with no troubles at all. The only problem it can have is starting in a morning, it sometimes takes for ever to fire up. Once its started though, its fine for the rest of the day. just wondering if anyone else is running a v6 this way and offer any solutions to 1st ime starting!!....
cheers
cheers