Editorial & Source Policy

Every specification, fluid recommendation, and diagnostic guide on Zaezzd is cross-checked against primary international regulatory and standards bodies:

• UNECE World Forum for Harmonization of Vehicle Regulations (WP.29) — lighting, tire homologation (R30/R117), and vehicle safety standards.
• U.S. EPA & NHTSA — 5-cycle fuel economy data, ISO 3779 VIN vPIC tables, and safety recall campaigns.
• SAE International, API/ILSAC & ACEA — SAE J300 lubricant viscosity grades, API SP / ILSAC GF-6A, ACEA A/B and Low-SAPS C-series oil sequences, and SAE J2012 OBD-II trouble code definitions.
• Wikidata (CC0) & Wikimedia Commons — generation timelines and open-licensed automotive photography with full author and license attribution.