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Can ULSD compromise fuel seals (i.e. elastomers)?

April 26, 2017compromise elastomers FUEL seals ULSD

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Can ULSD compromise fuel seals (i.e. elastomers)?

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Old fuel seals may leak in some vehicles when ULSD is used. Fuel seals shrink and swell due to their continuous contact with fuel. If the fuel seal shrinks excessively, it can leak. Fuel seals in vehicles older than 1993 with high mileage (particularly those regularly operating at higher temperatures) are most at risk of leaking. Shell recommends customers contact their local dealer or vehicle manufacturer for additional information.