100%
STP Complete Fuel System Cleaner 5.25oz
by STP— Made in Multiple US facilities
Verified American Made
American Score
78% — Brand-verified
Why not 100%? Limited public documentation of specific factory location
Manufactured in Multiple US facilities
Manufacturing in USA since 1954Verified through 2 independent sources
- Brand website
- Product listing
Evidence Breakdown
Factory: Unspecified
Website claim: Yes
History: 20+ years
Overseas lines: None known
One-step complete fuel system cleaner for injectors, carburetors, intake valves, and combustion chambers. Made in USA. Helps restore fuel efficiency and reduce rough idling.
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STP Complete Fuel System Cleaner 5.25oz
78% American Score