Only U.S.-market sources: manufacturer owner's manuals and service bulletins, NHTSA and fueleconomy.gov (U.S. EPA / DOE).
Every number links to its source document and page. Values are published only from grade-A sources (manufacturer or government originals); anything else shows "Not yet verified".
A person checks every page against its sources and signs it off before it goes live.
Units are U.S.: quarts, psi, mpg. Recalls and fuel economy are refreshed from public APIs; retrieval dates are shown on each page.
Safety-related corrections (brakes, tire pressure, oil) are switched to "Not yet verified" within 24 hours of a report, then checked within 3 business days.
