{"nhtsa_id":10185081,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-01-05","date":"2020-12-03","document_id":"No. 52-20","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"List of approved C30 style engine oils for classic and new Porsche vehicles.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10185081-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10185081-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10185081","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PORSCHE","model":"PORSCHE","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}