bio diesel these days is much better than when it first come out better refinement and they filter it to a higher micron particulate........ i was working for ruttley freight when bio first come out it was winter,the fat from the fryers was not filterd out and it would saliderfy and block up the fuel filters pumps inc'jectors cost them a mint .......long storie is the fuel supplier picked up there game and now it is fine ........ bio is ok ...... e10 that is a whole different ball game