1. Shell said marketing margins at fuel stations widened because of declining supply costs. 2. Marketing margins also generally have been weak throughout the industry.3. "The first five months of this year we've really had dismal refining and marketing margins . 4. In the U . K ., marketing margins narrowed because of increased competition, Mobil said. 5. However, worldwide refining and marketing margins remain depressed, " said chairman and CEO Lucio Noto. 6. Marketing margins also generally have been weak, analysts said.7. Ashland Inc . said poor refining and marketing margins cut fourth-quarter profit by 7 percent. 8. In the U . K ., marketing margins fell because of increased competition, Mobil said. 9. They do not, in fact, and they are not; thanks respectively to fruit genetics and marketing margins . 10. Tosco Corp . reported better-than-expected fourth-quarter earnings, though poor refining and marketing margins cut profits by 11 percent.
