For the BIO-Cummins crowd some interesting "issues" with BIO per Cummins...
For more info click here for the Cummins BIO FAQs
1. What Cummins engines can be used with B20 biodiesel?
The current approved engine models are as follows:
On-Highway: ISX, ISM, ISL, ISC and ISB engines certified to EPA '02 and later emissions standards.
5. Do I need to modify any service intervals when switching from petrodiesel to biodiesel?
Due to the solvent nature of biodiesel and the potential for "cleaning" of the vehicle fuel tank and lines, new fuel filters must be installed when switching to biodiesel on used engines. Fuel filters will need to be replaced at half the standard interval for the next two fuel filter changes. After this initial period, you may revert to the intervals specified in your Operation and Maintenance Manual. For 2007 on-highway MidRange engines only, oil sampling will be necessary for the first six months of operation with biodiesel to monitor fuel dilution of the lubricating oil.