Ford says not to use more than a 5% blend of bio-diesel in your truck. If you live in a cooler climate get it all burned out before winter, at about 30 degrees it sets up like butter in the fuel filter housing. I have heard of people running as much as 50% bio in a 7.3L engine with no problems when it was warm outside but I am told it requires more frequent fuel filter changes.
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Ford says not to use more than a 5% blend of bio-diesel in your truck. If you live in a cooler climate get it all burned out before winter, at about 30 degrees it sets up like butter in the fuel filter housing. I have heard of people running as much as 50% bio in a 7.3L engine with no problems when it was warm outside but I am told it requires more frequent fuel filter changes.
do not use bio-diesel only use regular diesel, the bio fuel will clogged up all the fuel system