Quote:
Originally Posted by aklim
If it isn't mandated, how does the company know whether you are getting the good stuff or not? If not, why should they warranty your car?
True. However, when it is under warranty, you are running it at THEIR risk. Again, why should they take the risk?
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The vendor (unless he is getting it from some guy making it in his garage) will always get the ASTM test results for the biodiesel being pumped into the tanks that they have to sell to their customers. The same with gasoline or diesel, you can always ask the station for the ASTM test results for the diesel or gasoline you pump into your car. You can get a bad batch of diesel that will screw up your engine just as much as biodiesel.
My moms passat TDI doesnt take kind to crappy fuel, it will run like *****. We have gotten a bad tankfull of diesel from a beacon station, the engine idled terrible, fuel economy was bad, made it harder to start and ended up clogging the fuel filter. Soon after we put in diesel from the chevron station we normally fill up at and everything was back to normal. We decided never to go back and buy fuel from them.
But your point is valid, why should Mercedes Benz take the risk of the customer getting bunk fuel and screwing up the expensive fuel system? They shouldnt!
But thats not to say that properly made and tested biodiesel fuel will hurt the engine or fuel systems. Which is why i stress that if you are going to run biodiesel over the B5 limit in any late model diesel make 100% sure that the fuel has been tested and passed the ASTM test.
Otherwise YOU run it at your own risk and YOU are your own warranty, NOT Mercedes Benz.