A fuel which is comprised of both traditional gasoline as well as a secondary hydrocarbon of denatured ethanol with up to an 85% concentration.

Early Termination

Within a leasing agreement, prematurely ending a lease before the originally agreed upon length of time has been satisfied. Early terminations may occur due to a variety of circumstances both on the lesser and lessee side of the agreement.

Easy Entry

In-vehicle installation which automatically retracts the power seating and steering column whenever a driver switches the engine off. This retraction allows much more convenient stepping in and stepping out of vehicles.

EGR System

Also known as an “Exhaust Gas Recirculation System,” a system used to redirect a small amount of an engine’s exhaust directly back into its intake. This process works to keep a lower combustion temperature threshold within the engine by moving an additional amount of air within the system. It can also help to reduce overall vehicle emissions by preventing this additional amount from exhausting and reusing it for additional combustion operations.

Electric Battery Type

Specific battery type which is used within an electrical motor for both hybrid and all-electric vehicles. Examples of current battery compositions include Zebra Na/NiCL2, lithium ion, lead-acid, gel, flooded, and NiZn traction. Specific costs, lifespan, and vehicle usage will vary based on battery type used.

Electric Motor Performance

Overall ability for an electric or hybrid vehicle’s engine to operate under all types of engine usage and strain. Performance factors and measurements include overall torque, horsepower, and kilowatts. These measurements are often compared against similar gasoline models to better understand the specific differences in how a vehicle may operate.

Electronic Motor Type

Specific type of motor utilized within either an all-electric or hybrid vehicle that is used to provide power to the drive wheels. In most cases, this may include a permanent magnet motor or some other type of traction motor. Alternative motors may vary in the amount of power they provide in these automobiles.

Electric Vehicle

Automobile which is powered and run on 100% electricity and no gasoline, diesel, or hydrogen fuel. Electricity is typically provided to run these vehicles using batteries, capacitors, and even traction drive systems. Technological advances continue to improve operational efficiency of batteries for even better electric vehicle range and performance.

Electrochromatic Rearview Mirror

Rearview mirror technology which is used to improve safety during night driving. Sensors detect bright lights during night driving which may create distracting glare for the driver, then automatically dim the mirror to reduce the glare and improve driver visibility.

Electronic Brake Force Distribution

Equipped in some antilock braking systems, a feature which is used to automatically detect the necessary proportions to apply independent braking to each wheel within a vehicle. This allows for much greater braking accuracy and control within vehicle operation.

Electronic Stability Control

Refer to “Stability Control” for more information.

Emergency Brake Assist

Automatic, electronically-controlled system which improves braking safety and efficiency during emergency or panicked stopping situations. Sensors detect panic braking application and automatically adjusts vehicle brakes for more efficient application during these circumstances.

Emergency Braking Preparation

System used to detect potential braking systems and prepare brakes ahead of time for potential panic or immediate application. Utilizing the adaptive cruise control sensors, the system monitors the distance between the vehicle and other vehicles ahead of it. If it detects a fast enough acceleration toward a front-facing obstacle, the ABS will automatically engage to pre-fill brakes and move the brake pads to a closer proximity to the rotors. This will allow the driver to have much more effective brakes if they must be applied suddenly or in a panicked state. This safety mechanism helps to prevent potential collisions and mitigate damage by slowing down faster collisions.

Emergency Trunk Release

Pull-handle on the interior of a vehicle’s trunk which can be pulled to release the trunk hatch and open it in case someone is trapped inside. These handles typically glow in the dark so that a trapped person can locate them more easily.

Emissions Certification Standards

Specific numerical limitations established and published by the EPA and California Air Resource Board restricting the total number of pollutants a vehicle can produce in its emissions. These standards provide a threshold for manufacturers to improve the overall environmental impact of their vehicles.

Emissions Hoses and Tubes

The hoses and tubes within an emission control device used for a variety of purposes such as routing exhaust to various components of the engine or outward to the vehicle’s exhaust system.

Emissions Score

EPA-developed scoring system to provide a direct measurement of the total amount of emissions a vehicle produces under normal driving circumstances. Scores can range from 0 to 10 and are determined during a laboratory driving simulation for each specific automobile. 10 represents the lowest level of greenhouse gas emissions produced by a vehicle, and 0 reflects an extremely high level of emissions during operation.

Emissions Standards

Total amount of allowable greenhouse gases and other environmental pollutants a vehicle can emit in its exhaust as per EPA regulations. Measured levels of pollutants and emissions include NOx, nonmethane organic compounds, carbon monoxide, and other particulate matter. New vehicles are all subjected to rigorous testing using simulated driving to determine the emissions typically produced during operation.

Engine Auto Stop and Start

Automated system within a vehicle which turns off the engine whenever it remains stationary for a specific amount of time. Once the driver releases the brake and depresses the accelerator, the engine then automatically restarts and resumes operation. It can increase efficiency by preventing unnecessary engine operation and idling when a driver is not moving. The system can enable starting and stopping as a fairly seamless process for the driver.

Engine Descriptor

Specialized notation which is included within an automobile’s engine code to describe several specific aspects about the engine itself. Notations include options such as the emissions rating from the EPA as well as the vehicle’s fuel economy. Codes may also indicate whether or not an engine can run using more than one fuel source. All of this information can provide a much more detailed understanding of a vehicle than may be available through other means.

Engine Hour Meter

Device used within an engine which records the total number of hours an engine runs throughout the course of its lifetime. This provides hours including idling which provides more specificity on engine use beyond the odometer mileage reading.

Engine Oil

Viscous substance which is used to provide lubrication throughout an engine system. Oil is used to lubricate every moving part within a vehicle for ongoing smooth and efficient operation. This substance helps to reduce core engine operating temperature while reducing potential corrosion. Engines properly lubricated with oil are also subject to a lower risk for rust or other engine malfunction.

Engine Oil Level Warning System

System which alerts the driver to a potentially dangerous or damaging low level of oil within the engine system. In most cases, an indicator light on the dash alongside a chime notifies the driver when low oil levels require attention.

Engine Performance

Factors which determine an engine’s overall ability to function across a variety of uses and operations. Typical performance indicators include horsepower, torque, and fuel efficiency.

Engine Size

The total amount of engine displacement, according to the vehicle manufacturer. Measurement is typically provided in liters and includes the full volume of all cylinders within the engine.

Engine Thermostat

Device equipped within an engine which detects its localized temperature. The measurement uses the value obtained from the engine coolant as a mechanism to regulate and stabilize a vehicle’s cooling system. Ongoing cool temperatures are essential to proper, ongoing engine functionality.

Entry Lighting

System of lights equipped within a vehicle that provides easier entry or exit for both the driver and the passengers. These could include a variety of light installations on both the inside and outside of a vehicle.

Environmental Impact

Total assessment of all the environmental effects a vehicle may have throughout its entire lifespan. Impact is a broad term which may include a wide range of biophysical effects on components such as air quality, atmosphere-affecting pollutants, and more. The impact report encompasses initial production and regular usage all the way to its disposal.

EPA Fuel Economy and MPG Estimates

Independently determined measurement of the city and highway fuel efficiency of vehicles from the EPA. These values are determined using laboratory simulations for both highway and city driving.

EPA Interior Volume

The total amount of space within a vehicle cabin which is independently measured and verified by field tests from the EPA. Independent, practical testing ensures no discrepancy between initial design measurements and actual volume amounts.

EPA Testing

A wide range of laboratory testing and assessments conducted by the Environmental Protection Agency (EPA) in simulated and controlled driving circumstances. Data from these tests provide real-world measurements on vehicle factors such as fuel economy, total number of emissions, overall environmental impact, air pollution potential, and greenhouse gas production. These independent values ensure an objective assessment of every new vehicle released by all manufacturers.


A financial measurement which shows the total cash value a vehicle has in its current state respective to the loan against it. This value is determined by subtracting the total amount owed on a vehicle loan from the actual amount a vehicle is currently worth. Loan holders can leverage current equity in other vehicle purchases or financial transactions. It is also an important component within insurance determinations, vehicle sales, and accident assessments.


Also known as “Electronic Stability Control.” Refer to “Stability Control” for more information.

Estimated Annual Fuel Costs

The total amount of fuel costs a driver can expect to spend on a specific vehicle throughout regular usage within a year. This figure is determined from the EPA with several factors influencing its value. Costs assume a vehicle is driven 15,000 miles a year with an average fuel price per gallon determined based on current fuel prices and projected trends.


Shorthand for ethyl alcohol, a common fuel type used within combustion vehicles. Many gasoline types are also equipped with fuels including a mixture of ethanol for cleaner combustion with fewer pollutants in emissions.


Also known as “Electric Vehicle,” an automobile which runs entirely on electrical power.

EV Effective Range Per Charge

The typical distance an electric vehicle can travel on a fully charged battery. Distance is often measured in total miles, and it represents an average distance with normal driving under regular circumstances. To standardize the measurement, the EPA conducts independent testing to determine this range and lists it on its manufacturer sticker.

Evaporative Control Canister

Device which is used to contain a vehicle’s raw fuel vapors, or hydrocarbons, from the fuel tank as well as the carburetor bowl to prevent them from emitting out into the atmosphere. This device prevents the loss of these vapors to both to improve the overall fuel consumption potential of an engine system. It also prevents excess pollutants from being leaked out into the atmosphere.

Evaporative Control Canister Filter

The filtration device within an evaporative control canister which is responsible for filtering incoming air as fuel vapors are reintegrated back into the engine combustion system. The filter helps to retain as much fuel as possible while preventing the introduction of any particulates or additional matter into the engine.

Evaporative Control System

Part of the emission control system responsible for the prevention of raw fuel vapors from being released into the environment and atmosphere. This system retains fuel vapors for improved fuel economy while reducing the number of potential pollutants entering the atmosphere.

Excess Mileage Penalty

Within a vehicle leasing arrangement, the penalty amount per mile a lessee must pay for every mile driven past the agreed limit. In most standard leases, annual mileage limits typically range from 10,000 to 15,000 miles. However, total miles driven may also be used in a lease without specific annual limitations. Fees ordinarily range from 12 to 25 cents per mile over the agreed limitation.

Excess Wear and Tear

Within a leasing agreement, excess damage or wearing down of vehicle that goes above and beyond the typical expectations for its usage over the course of a lease. Normal depreciation of a vehicle is expected with regular usage and usually included as a component of a lease agreement. However, excess wearing down of parts and components may affect the terms of a leasing agreement and incur additional charges.

Exhaust Pressure Regulator Valve

Valve which improves overall fuel vaporizing efficiency by redirecting vehicle exhaust toward its intake system. Especially helpful in colder weather, this system can significantly reduce the warm-up time by reintegrating already warm exhaust alongside colder air from other sources drawn into the engine system.

Extended Warranty

Warranty associated with a vehicle provided by either the manufacturer or a separate company which extends the initial warranty beyond the time period initially included. Many extended warranties are included as an added incentive to new vehicles which may improve their selling potential. However, several used automobiles may also include separate third party extended warranties to cover operation far beyond the initial manufacturer warranty period.

Exterior Camera

Included vehicular camera mounted on its outside to provide a video picture to the driver. In many cases, these cameras are installed toward the rear of the vehicle to aid in parallel parking. They may be included alongside additional sensors or automated systems for improving safety for parallel parking or other activities.

Exterior Mirrors Adjustment Type

For a vehicle’s exterior mirrors, the type of control a driver uses to reposition the specific orientation of these mirror’s viewpoints. Examples include manual, memory, and power.

External Temperature Display

A digital readout of the temperature around the vehicle determined by a sensor equipped on the exterior.