100%
WD-40 Direct Injection Fuel System Cleaner Advanced Synthetic
by WD-40— Made in San Diego, CA
Verified American Made
American Score
88% — High
Why not 100%? Full verification requires additional independent sources
Manufactured in San Diego, CA
Manufacturing in USA since 1953Verified through 3 independent sources
- Known factory location
- Brand website
- Product listing
Evidence Breakdown
Factory: City-level verified
Website claim: Yes
History: 20+ years
Overseas lines: None known
Advanced synthetic fuel system cleaner for direct injection engines. Made in USA. Cleans GDI injectors, intake valves, and combustion chambers. Helps prevent rough idle and rough starts.
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WD-40 Direct Injection Fuel System Cleaner Advanced Synthetic
88% American Score