Does a vehicle need to be modified to use biodiesel?
No vehicle modifications appear to be necessary for blends of biodiesel up to 5% or B5. 20% blend (B20) or higher may require modifications. The solvency effect of biodiesel may cause the release of deposits on a vehicle’s fuel tank walls or pipes. These deposits may end up in the fuel filters and cause the filters to plug. Fuel filter should be checked more frequently during the initial use of biodiesel.