自動車用語

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自動車用語一部添付


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10W30An SAE classification for oil with an equivalent viscosity of 10 when cold (zero Celsius) and 30 when hot (100 Celsius.) (see also viscosity and SAE)


2-wheel alignmentWheel alignment, where measuring devices are only attached to the front wheels rather than all four, as in a four-wheel alignment. This is normally less expensive than four-wheel alignment and adequate under certain circumstances. For instance when the rear alignment is known good. (see also our Suspension Repair Category.)


4-wheel alignmentWheel alignment, where measuring devices are attached to all four wheels rather than just the front, as in a two-wheel alignment. This has the added advantage of correcting the rear as well as front alignment and insuring that tracking is correct on the vehicle. (see also our Suspension Repair Category. )
4WDAn acronym meaning Four Wheel Drive. An arrangement where the front and rear wheels can be linked to the transmission and used to propel the vehicle. (see also FWD and RWD)




5W30An SAE classification for oil with an equivalent viscosity of 5 when cold (zero Celsius) and 30 when hot (100 Celsius.) (see also viscosity and SAE)


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A/S tireStands for all season, a tire that can be used in snow as well as on the highway, but less aggressive than an M/S designation.



A/T tireStands for all terrain, a tire that can be used in mud and snow as well as on the highway, more aggressive than an M/S designation.


AALAAn acronym meaning American Automobile Labeling Act.


A little known law, requiring vehicles sold in the United States to be labeled as to the percentage of US/Canadian content and the Country of manufacture.


This information should be provided, upon request, by new vehicle dealerships in the United States.


ActuatorA device used to perform a mechanical action and is operated by electricity, vacuum or fluid pressure.


Actuators are often used to direct air from air conditioning systems in the dash.
Aftermarket partA part not supplied as original equipment on a vehicle, rather built by a third party.


A part that is not supplied by the original manufacturer of a vehicle. (See also OEM part)
AGCOAn acronym standing for Altazan's Garage COmpany; A Good COmpany
Air bagAnother name for the Supplemental Inflatable Restraint (SIR) system.


A combination of computer controlled inflatable devices that help cushion the occupants of the vehicle in a collision.

(See also SIR)
AlignmentAttachment of measuring devices to the vehicle’s wheels in order to measure and correct their positioning to the proper specifications.


This can be done on the front wheels only, in a two-wheel alignment or all four wheels, in a four-wheel alignment. (See also 4-wheel alignment) and our Suspension Repair Category.


AntifreezeA chemical, often comprised of ethylene glycol or propylene glycol which is combined with water and add to the engine to prevent freezing.


It also contains additives to prevent corrosion and raise the point of the mixture.


(see also coolant.)
APIAn acronym meaning American Petroleum Institute. A body that among other things, rates oil and lubricants and assigns a classification that producers can voluntarily display on products that meet the specifications.


A rating beginning with “S” is for gasoline engine classification. SN is the highest rating at the time of publication.


Ratings starting with “C” would pertain to diesel engines.

(see also SAE)
Aspect ratioThe ratio of width to sidewall height of the tire.


For instance a 235/75R16 tires is 75% as tall as it is wide.


For a calculator to demonstrate aspect ratio see ourMichelin Tire Category.


ASTMAn acronym meaning American Society for Testing and Materials.


An organization that provides standards for testing of a multitude of products and services.

As related to automotive, particularly standards for engine coolant.


ATFAn acronym meaning Automatic Transmission Fluid.


It does not denote a specific fluid rather a general term.
(See also Dexron and Mercon)