What method does Consumer Reports use to test fuel economy?

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Consumer Reports Utilizes a Detailed Fuel Flow Metering System for Fuel Economy Testing

Consumer Reports technicians employ a precise method to assess vehicle fuel economy by directly measuring the amount of gasoline delivered to the engine. This process involves attaching calibrated meters to the fuel lines of vehicles under controlled testing conditions. The tests are divided into two distinct scenarios: highway driving and city driving, with multiple runs conducted by different drivers to ensure reliability and account for potential variations.
Highway Fuel Economy Measurement

For highway fuel economy assessments, Consumer Reports utilizes a specific five-mile loop on Route 2. During this segment, technicians activate a device integrated into the vehicle's dashboard. This device controls the fuel flow meter, turning it on and off as the vehicle reaches a speed of 65 mph and passes designated highway road signs, thereby capturing fuel consumption data at consistent high-speed conditions.
City Driving Fuel Economy Assessment

The city driving test is conducted on the southern portion of Consumer Reports' dedicated test track. In this phase, vehicles are driven through a standardized route simulating stop-and-go traffic. This involves navigating loops, twists, and turns at a consistent speed to replicate urban driving conditions, measuring fuel consumption under these more demanding circumstances.
Ensuring Test Rigor and Accuracy

To mitigate any discrepancies arising from individual driving styles or procedural variations, Consumer Reports implements a rigorous testing protocol. Each vehicle undergoes three separate test runs for both highway and city conditions. These multiple runs are performed by two distinct drivers, allowing for a comprehensive evaluation and providing data points that can be averaged to ensure a more accurate and representative fuel economy rating.

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What method does Consumer Reports use to test fuel economy?

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