The Minnesota Trucking Association has asked Gov. Tim Pawlenty to repeal the state's two-month-old biodiesel mandate.
The Associated Press reported that truckers in the state are concerned over a recent rise in fuel filter problems, and they think biodiesel may be the culprit.
State officials, however, want to know what's clogging the filters before they take any action.
Researchers with the University of Minnesota have been working on the problem and told “Land Line Now” in early December that they had not yet come up with a solution.
Kelly Strebig, a researcher with the university, said there could be more than one source of the problem and it will just take more time and research to sort it all out.