Originally Posted by H-townbenzoboy

I alternate between petro diesel and biodiesel, depending on which is cheaper. When biodiesel is cheaper, I'll typically fill with B99, though it'll prob be B50 or B75 at the intial fillup, depending on how much petrol diesel is still in the tank at the time of intial fillup. When petro diesel is cheaper, I'll run a full blend. Depending on how much biodiesel might still be in the tank, it usually takes me a fillup or two to get back to pure petro diesel after switching from B99 to petro diesel. I like the quietness and smoothness of biodiesel, but prefer the energy content and better fuel mileage of petrol diesel.