Certain biofuels, though eco-friendly, have a reputation for gumming up engine parts, which affect vehicle performance and ultimately reduce engine life. So the idea of a bio-based motor oil makes some of us a little nervous. But one Bay Area-based company is hawking a green, biodegradable motor oil that it says will protect engines as well as name-brand, petroleum-based oil.
G-Oil, made by Green Earth Technologies, is made by converting tallow -- that's saturated cow fat to you and me -- into a high-value unsaturated oil, which is less likely to clog up engine parts. (Tallow was used historically … Read more