Matthew,

landrover use plastic fuel tanks, and synthetic rubber fuel lines so there is little, if any corrosion, in the tanks themselves, or corrosion of the fuel lines.... and yes - biodiesel is a mild solvent, so it will "clean" fuel lines, etc...

I started using biodiesel in my landrover about a year ago, and have not changed any fuel filters... I am notaware of any adverse effects on the engine..

regards,

biodiesel bob.