I live in Pennsylvania and all diesel is supposed to have 2% bio in it. Does that mean I should be running the ford oil recommendations for biodiesel?
Do you mean 5K oil changes and 10K fuel filter changes? - Well, I do that regardless of what type of fuel I purchase. If you travel a lot/far, there is no way to tell anyway. I also use the recommended dose of Opti-Lube summer blend with every tank.