I am looking at purchasing a 6810 harvester to do some custom work. My question is does anyone know what one of these things burns fuel wise per hour. A buddy thinks it has a 855 cummins in it, but that seems to big for a 6810. Not sure but if anyone has a rough number per hour would be great, or if you have a combine with a 300ish hp engine in it what you burn an hr. Thanks.