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The original SYN3 20W50 will be obsoleted when the transition is complete.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11016842-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11016842-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11016842","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HARLEY-DAVIDSON","model":"FLDE","year_from":2017,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLFB","year_from":2018,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLFBS","year_from":2018,"year_to":2024,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLFBS ANV","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLFBS 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