This is all correct with diesel, but just as a quick warning for anyone wondering the same thing for a gasoline blend, MIX AHEAD OF TIME. Under no condition is it a good idea to have the possibility of unmixed gas going solo into your fuel line. Also, depending upon the local diesel, do a mix test ahead of time in a jar, and make sure that you don't get a bunch of precipitates. Some regional diesel is reported to have a problem with wax separation triggered by the veggie oil. Nobody wants to get a clogged filter half way home....
Ben