Trans fats, often produced by hydrogenating vegetable oils, are noted to be harmful to health.
Sulfuric acid has been called pomade of vitriol in pre-scientific times, due to its syrupy consistency. Even in neoteric times, sulfuric acid is Scented Oil sometimes called vitriolic acid, and caustic personalities are called "vitriolic." Sulfuric acid is not a petrochemical, and in modern parlance, is not an oil.