Epa Milieage Estimates & Fuel Economy - Lexus RX 400h Hybrid Overview

EPA Mileage Estimates
& Fuel Economy
Quick Facts - EPA Mileage Estimates
The EPA estimated fuel economy numbers are derived from vehicle testing
conducted at the U.S. Environmental Protection Agency' s (EPA' s ) National
Vehicle and Fuel Emissions Laboratory in Ann Arbor, Michigan. Vehicle
manufacturers also submit test results based on strict EPA standardized drive
patterns. Each year, the EPA provides the data to the Department of Energy,
which publishes the results at www.fueleconomy.gov.
Some quick facts about EPA estimated fuel economy tests:
Federal law requires EPA estimated fuel economy to be provided on a fuel
economy label affixed to the window of every vehicle (see Figure 1). The EPA
estimates serve as a useful guide for comparing the relative fuel efficiency of
various vehicles and are intended for comparison only. Fuel economy estimates
are determined under ideal laboratory conditions following a standardized test
determined by federal law. Each vehicle must complete 2 tests simulating city
and highway driving. The vehicle' s drive wheels are placed on special equipment
that simulates the driving environment.
EPA Tests Assume:
• Very slow acceleration
• Straight, level roads
• Air-conditioning is turned off
• 18% idle time for city test
• 0 idle time for highway test
H Y B R I D O V E R V I E W
(See www.fueleconomy.gov for further details.)
• Average speed of 20 mph for city test
(top speed 56 mph)
• Average speed of 48 mph for highway
test (top speed of 60 mph)
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RX 400h
RX 400h