{"schemaVersion":"ready-scan.discovery-surface.v1","id":"urn:readyscan:corpus:buyer-question:crown-oil-q85754687-answer-0d80338e92e946cdd3ff","key":"buyer_question:crown-oil-q85754687-answer-0d80338e92e946cdd3ff","kind":"buyer_question","slug":"crown-oil-q85754687-answer-0d80338e92e946cdd3ff","canonicalUrl":"https://directory.readyscan.ai/corpus/buyer-question/crown-oil-q85754687-answer-0d80338e92e946cdd3ff","machineUrl":"https://directory.readyscan.ai/discovery/corpus/buyer-question/crown-oil-q85754687-answer-0d80338e92e946cdd3ff.json","datePublished":"2026-10-22","dateModified":"2026-10-22","materialFingerprint":"fnv1a64:f50a4ec9e70088b8","membershipFingerprint":"fnv1a64:29620dec7a97c81e","relatedEntitySlugs":["crown-oil-q85754687"],"relatedSurfaceKeys":["buyer_question:crown-oil-q85754687-answer-268a2e41fdcf11a81e7e","buyer_question:crown-oil-q85754687-answer-42410b9d9a1e85447a8a","buyer_question:crown-oil-q85754687-answer-59a1e15229301b525912","buyer_question:crown-oil-q85754687-answer-6451a29b4e5602b6cf16","buyer_question:crown-oil-q85754687-answer-ea72a25b451d09109464","evidence:crown-oil-q85754687"],"sourceIds":["ready-scan-subjects"],"provenance":[{"snapshotId":"crown-oil-q85754687-content-eb66ee43e106520e-snapshot","sourceId":"ready-scan-subjects","sourceRecordId":"Q85754687","sourceRevisionId":"Q85754687:content:e700b78eaae2c548","sourceContentHash":"fnv1a64:5462fac12915dc39","recordRevisionId":"Q85754687:content:e700b78eaae2c548","recordContentHash":"fnv1a64:9ee4cd53272776bb","sourceCanonicalUrl":"https://www.crownoil.co.uk/","sourceModifiedAt":"2026-10-22T08:07:40.690Z","observedOn":"2026-10-22","permission":{"basis":"public_information","evidenceUrl":"https://www.crownoil.co.uk/"},"attributionUrl":"https://www.crownoil.co.uk/"}],"quality":{"method":"same_kind_unique_trigram_floor","minimumUniqueTrigramRatio":0.3,"status":"passed"},"title":"Why do modern diesel engines require AdBlue®?","summary":"Cited source answers across 1 active corpus record.","question":"Why do modern diesel engines require AdBlue®?","answers":[{"entitySlug":"crown-oil-q85754687","entityName":"Crown Oil","answer":"“AdBlue® is required for modern diesel vehicles (typically those manufactured since around 2006, especially commercial vehicles over 7.5 tonnes) that use Selective Catalytic Reduction (SCR) technology. It is essential for meeting strict Euro 4, 5 and 6 emission standards by reducing harmful emissions.”","sourceUrls":["https://www.crownoil.co.uk/faq/adblue-faqs/"]}]}