TOP TIER™ Performance Standards

Gasoline Performance Standard

The TOP TIER™ Detergent Gasoline Deposit Control Performance Standard describes the test methods used and the performance requirements that retail unleaded gasoline must meet to be licensed as TOP TIER™.

Gasoline Standard

Diesel Performance Standard

The TOP TIER™ Diesel Fuel Performance Standard was developed to improve performance, in turn helping the diesel fuel retailers, auto and engine manufacturers, and particularly those who drive or use diesel-powered equipment.

Diesel Standard
Gasoline Standard
Diesel Standard

A Higher Fuel Standard

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Is TOP TIER™ Better?

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What is TOP TIER™ gasoline?

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