I'm started on my third fill up with B-20 biodiesel. While the engine has never run so quiet and smooth, the fuel economy has dropped!

With dino and a little Power Services added, I had been getting 30 mpg quite consistently. But now as I've burned two tank fulls of B-20, my mpg's have dropped to 24.2, the lowest mpg I've ever seen with this car!

Anyone have any comments?

BB