STP Oil Treatment Additive from Mexico
A multi-functional engine oil additive containing viscosity improvers and anti-wear agents designed to enhance lubrication in mineral motor oils. It falls under HTS 3811.90.00.00 as a prepared additive for mineral oils used in gasoline engines, improving film strength and reducing friction. Primarily used by consumers to extend engine life in passenger vehicles.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Verify EPA registration if claims include emissions reduction; ensure SDS includes exact chemical composition for CBP review; avoid misclassification as finished lubricant by confirming it's an additive concentrate