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Fatty acid methyl esters (FAME) biodiesel degrades rapidly in storage, absorbs moisture, and causes significant fuel-related engine issues.0:26 Because of these chemical instabilities, FAME requires strict storage limitations and should not remain in a boat's fuel tank for extended periods.0:44 In contrast, hydrogenated vegetable oil (HVO) functions similarly to mineral diesel and maintains stability during long-term storage.0:26 Engine manufacturers, including Volvo Penta, now certify specific engines to run on 100% HVO.1:07 While HVO availability remains limited, it serves as a viable alternative to traditional biodiesel and eliminates many common fuel-system maintenance problems.0:26 Owners should treat HVO with the same protocols used for standard petroleum-based diesel.1:25 Proper fuel management remains a critical factor in preventing engine failure.1:47

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