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ET

An acronym for elapsed time.

Et

Abbrevation for elapsed time.

ETA

Estimated time of arrival.

ETBE

An acronym for ethyl tertiary butyl ether. This fuel Oxygenate is manufactured by reacting isobutylene with ethanol, the resulting ether is high in octane and low in volatility and can be added to gasoline up to a level of 17% by volume.

Etching

The localized attack of metal surfaces causing pitting and/or deterioration.

Ethane

C2H6, a minor component of natural gas used as a fuel.

Ethanol

A form of alcohol, C2H5OH, found in alcoholic beverages and also used as an additive in gasoline to produce gasohol and is used as a Oxygenate in reformulated gasoline. Also used as an octane enhancer 10 % added to gasoline will increase octane 2.5 to3.0 numbers.

Ethyl

The trade name for tetraethyl lead, a fuel additive no longer permitted due to environmental hazards.

Ethyl Alcohol

A term often used for ethanol.

Ethylene Glycol

The basic chemical used in automotive antifreeze; mixed with water for cooling-system protection and to increase the boiling point of the coolant.

Ethylene Glycol Antifreeze

Normally (Green) Ethylene Glycol has been the standard antifreeze for automobiles since the 1940's.

ETI

An acronym for Equipment and Tools Institute.

ETR

Electronically tuned receiver or emergency tensioning retractor.

ETS

Engine temperature sensor.

ETSA

Engine timing sensor assembly.

ETV

Electronic throttle valve.

Eu

Europium An element with the atomic number of 63.

Eurostyle

A custom styling treatment to provide a European flair.

EV

Electric vehicle.

Evacuate

1. To create a vacuum within a system to remove all traces of air and moisture. 2. A service procedure using a vacuum pump to remove all atmospheric air and moisture from inside an air-condition system.