TOP TIER Detergent Gasoline helps drivers avoid lower-quality gasoline that can leave deposits on critical engine parts, which reduces engine performance. TOP TIER Detergent Gasoline contains significantly higher levels of detergent to help keep a vehicle’s intake system clean, improve mileage, reduce emissions, provide unsurpassed anticorrosion protection and maintain a vehicle’s engine for peak performance.
The TOP TIER program is not just about a high detergency rate. It is about an engine cleanliness and performance specification.

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