Large ships are the #1 cause of Carbon Monoxide emissions into the earth's atmosphere, and the biggest current target for environmentalists right now, according to an oceanographer that I met with last week. Also, they cannot come within 200 miles of the United States unless they are burning the newest clean diesel blend, (that is the distance of our jurisdiction into international seaways). Since the open seas are not regulated, most ships simply switch tanks to clean fuel when they get 200 miles from us and then go back to the bad stuff when they leave. It's an environmental catastrophe and the oceans are deteriorating WAY ahead of even the worst predictions. And let's not even talk about the Arctic ice melt, don't want to get suicidal.

You can say that you don't give a schit, but the statement above about *not doing harm to the environment* is ignorant. If you want to add some needed lubricity to modern ULSD for older diesels, nothing is better than a clean biodiesel, (not WVO or SVO), and second place would be a very small amount of TC-W3 outboard motor oil, IMO.