did anyone read this post?
http://www.dieselplace.com/forum/showthread.php?t=177728

If I read this correctly,
biodiesel is the best lube you can put in your tank as far as lubricity goes.
and their test was done at 2% biodiesel?

Hell I run B-50 and was wondering if that was enoughf

Yep, you read it right. That is the lubricity study Spicer conducted. Biodiesel was the top performing fuel additive/fuel. Opti-lube was the best aftermarket lubricity additive.