I'm in MN.
We have up to B20.
All diesel fuel in MN is at least B5 by law.
Bio fuel does have more lubricity than reg diesel fuel does.
In the winter the % of BIO falls as gelling is a problem,
so there is more % of bio in the summer fuel than the winter fuel.
All cumins engines are approved to use up to B20 pre DPF/emission trucks can run a much higher % .