compression ratio MAZDA MODEL 6 2009 Owners Manual (in English)

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Specialized glossary
MP3
Abbreviation for“MPEG Audio Layer 3 ”.
A technical standard for audio
compression as decided by an ISO
(International Organization for
Standardization) MPEG working group.
Use of MP3 allows for audio data to be
compressed to approximately a tenth of
the source data size.
ISO 9660
An international standard for logical
formatting of CD-ROM files and folders.
It is divided into three separate levels
based on differences in file naming
procedures, data configuration and other
characteristics.
Multi-session
A session is the complete amount of data
recorded from the beginning to the end of
a single period of CD-ROM, CD-R/CD-
RW data recording. Multi-session refers to
the existence of data from two or more
sessions on a single disc.
Sampling
Refers to the process of encoding analog
audio data at regular intervals and
converting it to digital data. The sampling
rate refers to the number of times a
sample is taken in one second and is
expressed in Hz units. Increasing the
sampling rate improves the sound quality
but also increases the data size. Bit rate
Refers to the volume of data per second,
expressed in bps (bits per second).
Generally, the larger the number of the
transfer bit rate when compressing an
MP3 file, the more information regarding
musical reproduction it carries, and
therefore the better the sound quality.
Packet writing
A general term for the method, similar to
that used for floppy discs or hard drives,
of recording the required file in a single
increment on a CD-R and similar.
ID3 Tag
ID3 tag is a method for storing
information related to the music in an
MP3 file. Information such as track, artist
and album name can be stored. This
content can be freely edited using ID3
editing function software.
VBR
Abbreviation for Variable Bit Rate. While
CBR (Constant Bit Rate) is generally
used, VBR varies the bit rate for audio
compression according to compression
conditions and this allows for
compression with preference given to
sound quality.
q
Operating Tips for WMA
WMA is short for Windows Media Audio
and is the audio compression format used
by Microsoft.
Audio data can be created and stored at a
higher compression ratio than MP3.
* Microsoft and Windows Media are
registered trademarks of Microsoft
Corporation U.S. in the United States
and other countries.
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Interior Comfort
Audio System
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*AUDIOPILOT®(Bose®SoundSystem-equipped model)
AUDIOPILOT®automatically adjusts
audio volume and sound quality in
accordance with the level of noise
entering the vehicle interior while driving.
When AUDIOPILOT
®is turned on, the
system automatically calculates the
conditions for optimum hearing of sound
which may be difficult to hear depending
on exterior noise.
* AUDIOPILOT
®is a registered
trademark of Bose Corporation.
*Centerpoint®(Bose®Sound System-equipped model)
Centerpoint®offers you the experience of
5.1-channel surround sound in your
vehicle even with your conventional 2-
channel stereo CDs.
Centerpoint
®can be set on or off.
NOTE
lCenterpoint®operates optimally with a 2-
channel stereo CD. MP3 audio files can be
played, however, MP3 audio files encoded
with high compression may result in poor
sound quality.
lCenterpoint®is available for 2-channel
stereo audio except for AM radio/FM radio/
SIRIUS digital satellite radio/AUX/BT
audio.
* Centerpoint®is a registered trademark
of Bose Corporation.
BEEP setting
The beep-sound when operating the audio
system can be set on or off.
ILLM EFT setting (Illumination settingduring operation)
The audio system illumination during
operation can be set on or off.
Welcome modeí
The welcome mode provides the
following presentation:
lSound is heard when the ignition is
turned on.
lIllumination turns on when a door is
opened after unlocking the doors.
Only the sound effect can be switched on
or off.
BT SETUP modeí
Music and other audio such as voice data
recorded on portable audio devices and
mobile phones available on the market
which are equipped with the Bluetooth
transmission function can be listened to
via wireless transmission over the
vehicle's speakers. Using the BT SETUP
mode, these devices can be programmed
to the Bluetooth unit or changed. For
details, refer to Bluetooth audio (page
6-63).
Interior Comfort
Audio System
6-31íSome models.
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Specifications
qEngine
Item Specification
2.5-liter engine 3.7-liter engine
Type DOHC-16V in-line, 4-cylinder DOHC-24V 60°V, 6-cylinder
Bore×Stroke 89.0 × 100 mm (3.50 × 3.94 in) 95.5 × 86.7 mm (3.75 × 3.41 in)
Displacement 2,488 ml (2,488 cc, 151.8 cu in) 3,726 ml (3,726 cc, 227.4 cu in)
Compression ratio 9.710.3
qElectrical System
Item Classification
Battery 12V-46AH/5HR
Spark-plug number 2.5-liter engine LFG1 18 110
*1
L3Y2 18 110
3.7-liter engine CY01 18 110*1
Spark-plug gap2.5-liter engine
1.25―1.35 mm (0.049 ―0.053 in)
3.7-liter engine 1.29―1.45 mm (0.051 ―0.057 in)
*1 ex factory
CAUTION
When cleaning the iridium plugs, do not use a wire brush.
(2.5-liter engine) The fine particulate coating on the iridium alloy and platinum tips
could be damaged.
(3.7-liter engine) The fine particulate coating on the platinum alloy could be
damaged.
q Lubricant Quality
Lubricant Classification
Engine oil Refer to the recommended SAE viscosity numbers on page
8-19.
Manual transaxle oil Any temperature
API Service
GL-4 or GL-5
SAE 75W-90
Above 10°C (50°F) API Service
GL-4 or GL-5
SAE 80W-90
Automatic transaxle fluid 2.5-liter engine
ATF M-V
3.7-liter engine JWS3309
Power steering fluid ATF M-V
Brake/Clutch fluid SAE J1703 or FMVSS116 DOT-3
10-4
Specifications
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