I think Jack just made the point I was going to raise. The reason there's such a variation and why you've seen different numbers is that it's very affected by what feedstock was used to make the biodiesel. And even those have their pluses and minuses. The rendered animal fats have worse cold flow properties, but higher cetane, which is also something that is of value when you're blending it. So I think it's quite possible that the type of biodiesel in demand will have some seasonal variance.
The largest plant in Canada is using a mix of tallow and canola oil. They aren't making biodiesel from just canola or just tallow; they're doing about a 50-50 mix, which gives you totally different cold flow properties and cetane numbers.
So it is very difficult to give a hard and fast answer on that because it really depends on what you're making the biodiesel out of and whether it's a blend--