With regard to biodiesel fuel for my tractor, Case IH specifies biodiesel blends meeting ASTM 6751 or EN14214 up to B5 (5% blend ratio). I will quote from the Operators Manual:
"Biodiesel Fuel must be purchased from a trusted supplier that understands the product and maintains good fuel quality."
Also:
"Engine performance is affected by the use of Biodiesel Fuel. There may be up to 12 percent reduction in power or torque depending on the blend used.
NOTICE: DO NOT modify the engine and/or injection pump settings to recover reduced performance.
The reduced power must be accepted if using any Biodiesel Fuel.
Some modifications may be required to allow your engine to run Biodiesel Fuel. Consult your dealer for complete information on these modifications.
NOTICE: The use of high Biodiesel Fuel blends are not recommended in cold weather conditions."
I do not use Biodiesel Fuel or plan to use it.
"Biodiesel Fuel must be purchased from a trusted supplier that understands the product and maintains good fuel quality."
Also:
"Engine performance is affected by the use of Biodiesel Fuel. There may be up to 12 percent reduction in power or torque depending on the blend used.
NOTICE: DO NOT modify the engine and/or injection pump settings to recover reduced performance.
The reduced power must be accepted if using any Biodiesel Fuel.
Some modifications may be required to allow your engine to run Biodiesel Fuel. Consult your dealer for complete information on these modifications.
NOTICE: The use of high Biodiesel Fuel blends are not recommended in cold weather conditions."
I do not use Biodiesel Fuel or plan to use it.