11. The Byzantio carries the same kind of heavy fuel oil that spewed from the Prestige. 12. Sweet crudes have a lower heavy fuel oil content. 13. The energy mix of insular energy systems is dominated by diesel and heavy fuel oil . 14. They typically burn heavy fuel oil , and may be able to switch between the two. 15. Underway, the ship burned heavy fuel oil at a rate of 128 tons per day. 16. The refinery provides unleaded gasoline, seasonal diesel fuels, mixed propane and butane, and heavy fuel oil . 17. The two power plants, which will burn heavy fuel oil , will cost about $ 25 million. 18. The wrangle over providing heavy fuel oil to North Korea is particularly galling to many South Koreans. 19. Such reaction is particularly true for heavy fuel oil , where a significant amount of vanadium is present. 20. The second plant uses heavy fuel oil .