ENGINE [SKYACTIV-G 2.0, SKYACTIV-G 2.5]

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Special Features

• For SKYACTIV-G 2.0 and SKYACTIV-G 2.5, the following is performed to lower fuel consumption.

― Improvement of mechanical resistance loss

• Narrowed down crankshaft journal

• Optimized piston skirt shape

• Lowered piston ring tension

• Roller follower adopted

• Reduction of valve spring load

• Stabilization of timing chain behavior

• Optimized engine coolant passage

• Optimized water pump impeller shape

• Lowered drive belt tension

• Optimized oil passage

• Optimized oil pump shape

• Oil pump discharging pressure control has been adopted.

― Improvement of pumping loss

• Variable valve timing mechanism has been adopted on both sides of intake and exhaust.

• L-jetronic^*1 and D-jetronic^*2 type detectors have been combined for intake air amount detection, improving the accuracy of the intake air amount measurement.

― MAF sensor adopted

― MAP sensor adopted

― IAT sensor No.1 and No.2 adopted

• Valve timing control has been adopted on both sides of the intake and exhaust, improving fuel economy and emission performance.

Intake side: Electric variable valve timing control

― Intake CMP sensor adopted

― Electric variable valve timing motor/driver adopted

― Electric variable valve timing relay adopted

Exhaust side: Hydraulic variable valve timing control

― Exhaust CMP sensor adopted

• Engine oil control has been adopted reducing engine load.

― Engine oil solenoid valve adopted

• DC-DC converter control has been adopted for improved power supply stability.

― DC-DC converter adopted

• With the adoption of fuel pump control, fuel pump power consumption has been reduced, improving fuel economy.

― Fuel pump control module adopted

• Generator output control adopted, fuel economy/idling stability improved.

― Current sensor adopted

• With the adoption of the ion sensor, which detects pre-ignition, engine reliability has been improved.

• LIN communication has been adopted to the current sensor and DC-DC converter for simplified wiring harnesses. (Without i-ELOOP)

• With the adoption of the i-ELOOP, charging efficiency during deceleration is improved. Because loss of engine force does not occur when the battery is recharged during deceleration, fuel economy is improved. (With i-ELOOP)

*1 :Measures the intake air amount directly using the MAF sensor.

*2 :Measures the intake air pressure introduced into the cylinder using the MAP sensor and calculates the intake air amount indirectly.

Specification

Item

Specification

SKYACTIV-G 2.0

SKYACTIV-G 2.5

MECHANICAL

Type

Gasoline, 4-cycle

Cylinder arrangement and number

In-line, 4-cylinder

Combustion chamber

Pentroof

Valve system

DOHC, timing chain driven, 16 valves

Displacement

(ml {cc})

1,998 {1,998}

2,488 {2,488}

Bore × stroke

(mm {in})

83.5 × 91.2 {3.29 ×3.59}

89.0 × 100 {3.50 × 3.94}

Compression ratio [European (L.H.D. U.K.) specs.]

14.0:1

13.0:1

Compression ratio [Except European (L.H.D. U.K.) specs.]

13.0:1/14.0:1

Valve timing

IN

Open

BTDC (°)

-32―42

Closed

ABDC (°)

110―36

EX

Open

BBDC (°)

54―9

58―13

Closed

ATDC (°)

7―52

6―51

LUBRICATION SYSTEM

Type

Force-fed type

Oil pressure (reference value)

[Water temperature 80―90 degrees C]

(kPa {kgf/cm², psi}[rpm])

Low oil pressure: 110―175 {1.13―1.78, 16.0―25.3}[1,500]

High oil pressure: 300―430 {3.06―4.38, 43.6―62.3}[4,500]

Oil pump

Type

Trochoid gear type

Oil filter

Type

Full-flow, paper element

Bypass pressure

(kPa {kgf/cm², psi})

78—118 {0.80—1.20, 12.0—17.1}

Oil capacity (approx. quantity)

Total (dry engine)

(L {US qt, lmp qt})

Without oil cooler: 4.9 {5.2, 4.3}

With oil cooler: 5.0 {5.3, 4.4}

5.4 {5.7, 4.8}

Oil replacement

(L {US qt, lmp qt})

4.0 {4.2, 3.5}

4.3 {4.5, 3.8}

Oil and oil filter replacement

(L {US qt, lmp qt})

4.2 {4.4, 3.7}

4.5 {4.8, 4.0}

COOLING SYSTEM

Type

Water-cooled, Electromotive

Water pump

Type

Centrifugal, V-ribbed belt-driven

Thermostat

Type

Wax type

Opening temperature

(°C {°F})

80.5―83.5 {177―182}

Full-open temperature

(°C {°F})

95 {203}

Full-open lift

(mm {in})

8.5 {0.33} or more

Radiator

Type

Corrugated fin type

Cooling system cap

Valve opening pressure

(kPa {kgf/cm², psi})

93.2―122.6 {0.951―1.250, 13.6―17.7}

Cooling fan

Type

Electric type

Number of blades

Cooling fan No.1: 5

Cooling fan No.2: 7

Outer diameter

(mm {in})

320 {12.6}

Cooling fan motor output

(W)

80

FUEL SYSTEM

Fuel injector

Type

High resistance

Fuel supply method

Top-feed

Drive types

Electronic type

Pressure regulator control pressure

(kPa {kgf/cm², psi})

Approx. 430 {4.38, 62.4}

Fuel pump

Type

Electric

Fuel tank

Capacity

(L {US gal, lmp gal})

2WD

56.0 {14.8, 12.3}

4WD

58.0 {15.3, 12.8}

EMISSION SYSTEM

Catalyst

Type

WU-TWC (monolith)

TWC (monolith)

EVAP control system

Type

Charcoal canister type

PCV system

Type

Closed type

CHARGING SYSTEM

Battery

Voltage

(V)

12

Type (with i-stop)

Q-85

Type and capacity (without i-stop)

(A·h/5HR, A·h/20HR)

55D23L (48, 55)

75D23L (52, 65)

Generator

Output

(V-A)

12-100

Regulated voltage

Controlled by PCM

Self diagnosis function

IGNITION SYSTEM

Ignition system

Type

SEI

Spark advance

Electronic

Firing order

1—3—4—2 (all cylinders independent firing)

Spark plug

Type

PE5R-18-110

PE5S-18-110

STARTING SYSTEM

Starter

Type

Coaxial reduction

Output

(kW)

Without i-stop: 1.0

1.4

With i-stop: 1.4

CONTROL SYSTEM

i-stop OFF switch

ON/OFF

Neutral switch

ON/OFF

CPP switch

ON/OFF

MAF sensor

Hot film

IAT sensor

Cold resistor

MAP sensor

Sealant diaphragm

TP sensor

Hall element

APP sensor

Hall element

CKP sensor

MR (Magnetic Resistance) element

CMP sensor

GMR element

ECT sensor

Thermistor

BARO sensor

Piezoelectric element

Fuel pressure sensor

Metal diaphragm

KS

Piezoelectric element

Current sensor

Shunt resistance, Thermistor

A/F sensor

Zirconia element

HO2S

Zirconia element

Clutch stroke sensor

Hall element

Power brake unit vacuum sensor

Piezoelectric element

Item	Specification
MECHANICAL
Type	Gasoline, 4-cycle
Cylinder arrangement and number	In-line, 4-cylinder
Combustion chamber	Pentroof
Valve system	DOHC, timing chain driven, 16 valves
Displacement	(ml {cc})	1,998 {1,998}	2,488 {2,488}
Bore × stroke	(mm {in})	83.5 × 91.2 {3.29 ×3.59}	89.0 × 100 {3.50 × 3.94}
Compression ratio [European (L.H.D. U.K.) specs.]	14.0:1	13.0:1
Compression ratio [Except European (L.H.D. U.K.) specs.]	13.0:1/14.0:1
Valve timing	IN	Open	BTDC (°)	-32―42
Closed	ABDC (°)	110―36
EX	Open	BBDC (°)	54―9	58―13
Closed	ATDC (°)	7―52	6―51
LUBRICATION SYSTEM
Type	Force-fed type
Oil pressure (reference value) [Water temperature 80―90 degrees C]	(kPa {kgf/cm², psi}[rpm])	Low oil pressure: 110―175 {1.13―1.78, 16.0―25.3}[1,500] High oil pressure: 300―430 {3.06―4.38, 43.6―62.3}[4,500]
Oil pump	Type	Trochoid gear type
Oil filter	Type	Full-flow, paper element
Bypass pressure	(kPa {kgf/cm², psi})	78—118 {0.80—1.20, 12.0—17.1}
Oil capacity (approx. quantity)	Total (dry engine)	(L {US qt, lmp qt})	Without oil cooler: 4.9 {5.2, 4.3} With oil cooler: 5.0 {5.3, 4.4}	5.4 {5.7, 4.8}
Oil replacement	(L {US qt, lmp qt})	4.0 {4.2, 3.5}	4.3 {4.5, 3.8}
Oil and oil filter replacement	(L {US qt, lmp qt})	4.2 {4.4, 3.7}	4.5 {4.8, 4.0}
COOLING SYSTEM
Type	Water-cooled, Electromotive
Water pump	Type	Centrifugal, V-ribbed belt-driven
Thermostat	Type	Wax type
Opening temperature	(°C {°F})	80.5―83.5 {177―182}
Full-open temperature	(°C {°F})	95 {203}
Full-open lift	(mm {in})	8.5 {0.33} or more
Radiator	Type	Corrugated fin type
Cooling system cap	Valve opening pressure	(kPa {kgf/cm², psi})	93.2―122.6 {0.951―1.250, 13.6―17.7}
Cooling fan	Type	Electric type
Number of blades	Cooling fan No.1: 5 Cooling fan No.2: 7
Outer diameter	(mm {in})	320 {12.6}
Cooling fan motor output	(W)	80
FUEL SYSTEM
Fuel injector	Type	High resistance
Fuel supply method	Top-feed
Drive types	Electronic type
Pressure regulator control pressure	(kPa {kgf/cm², psi})	Approx. 430 {4.38, 62.4}
Fuel pump	Type	Electric
Fuel tank	Capacity (L {US gal, lmp gal})	2WD	56.0 {14.8, 12.3}
4WD	58.0 {15.3, 12.8}
EMISSION SYSTEM
Catalyst	Type	WU-TWC (monolith) TWC (monolith)
EVAP control system	Type	Charcoal canister type
PCV system	Type	Closed type
CHARGING SYSTEM
Battery	Voltage	(V)	12
Type (with i-stop)	Q-85
Type and capacity (without i-stop)	(A·h/5HR, A·h/20HR)	55D23L (48, 55) 75D23L (52, 65)
Generator	Output	(V-A)	12-100
Regulated voltage	Controlled by PCM
Self diagnosis function
IGNITION SYSTEM
Ignition system	Type	SEI
Spark advance	Electronic
Firing order	1—3—4—2 (all cylinders independent firing)

Spark plug	Type	PE5R-18-110 PE5S-18-110
STARTING SYSTEM
Starter	Type	Coaxial reduction
Output	(kW)	Without i-stop: 1.0	1.4
With i-stop: 1.4
CONTROL SYSTEM
i-stop OFF switch	ON/OFF
Neutral switch	ON/OFF
CPP switch	ON/OFF
MAF sensor	Hot film
IAT sensor	Cold resistor
MAP sensor	Sealant diaphragm
TP sensor	Hall element
APP sensor	Hall element
CKP sensor	MR (Magnetic Resistance) element
CMP sensor	GMR element
ECT sensor	Thermistor
BARO sensor	Piezoelectric element
Fuel pressure sensor	Metal diaphragm
KS	Piezoelectric element
Current sensor	Shunt resistance, Thermistor
A/F sensor	Zirconia element
HO2S	Zirconia element
Clutch stroke sensor	Hall element
Power brake unit vacuum sensor	Piezoelectric element

Compression pressure [SKYACTIV-G 2.0, European (L.H.D. U.K.) specs.]

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Compression pressure [SKYACTIV-G 2.0, Except European (L.H.D. U.K.) specs.] (Compression ratio of 13)

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Compression pressure [SKYACTIV-G 2.0, Except European (L.H.D. U.K.) specs.] (Compression ratio of 14)

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Compression pressure [SKYACTIV-G 2.5]

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Engine oil [Europe]

Recommended engine oil		Alternative engine oil
Mazda Original Oil Supra 0W-20	Mazda Original Oil Ultra 5W-30	API SL/SM/SN^*1 or ACEA A3/B3 or A5/B5 0W-20, 5W-30

*1 :Use API SM/SN in Kazakhstan.

Engine oil [Except Europe]

Item	Specifications
Grade	API SG/SH/SJ/SL/SM/SN or ILSAC GF-2/GF-3/GF-4/GF-5
Viscosity (SAE)	10W-30, 10W-40, 10W-50, 5W-20, 5W-30, 5W-40, 0W-20, 0W-30

Engine coolant capacity (approx. quantity)

Specs.	SKYACTIV-G 2.0 MTX	SKYACTIV-G 2.0 ATX	SKYACTIV-G 2.5 ATX
European (L.H.D.) specs., Russia	7.1 L {7.5 US qt, 6.2 Imp qt}	7.3 L {7.7 US qt, 6.4 Imp qt}	7.5 L {7.9 US qt, 6.6 Imp qt}
European (U.K.) specs.	6.9 L {7.3 US qt, 6.1 Imp qt}	—	—
General (L.H.D.) specs.	7.1 L {7.5 US qt, 6.2 Imp qt}	7.3 L {7.7 US qt, 6.4 Imp qt}	7.5 L {7.9 US qt, 6.6 Imp qt}
Australian, General (R.H.D.) specs.	6.9 L {7.3 US qt, 6.1 Imp qt}	7.2 L {7.6 US qt, 6.3 Imp qt}	7.3 L {7.7 US qt, 6.4 Imp qt}
Saudi	—	7.6 L {8.0 US qt, 6.7 Imp qt}	7.5 L {7.9 US qt, 6.6 Imp qt}
Israel	—	7.4 L {7.8 US qt, 6.5 Imp qt}	7.5 L {7.9 US qt, 6.6 Imp qt}
Malaysia, Thailand	—	7.4 L {7.8 US qt, 6.5 Imp qt}	7.6 L {8.0 US qt, 6.7 Imp qt}

Fuel type

Fuel	Research Octane Number	Country
Premium unleaded fuel (Conforming to EN 228 and within E10)^*1	95 or above	New Caledonia, Turkey, Azerbaijan, Armenia, Georgia, Kazakhstan, Canary Islands, Reunion, Morocco, Austria, Greece, Italy, Switzerland, Belgium, Denmark, Finland, Norway, Portugal, Spain, Sweden, Hungary, Germany, Poland, Bulgaria, Croatia, Slovenia, Luxembourg, Slovakia, Latvia, Lithuania, Russia, Belarus, France, Ukraine, Czech, Estonia, Faeroe, Iceland, Romania, The Netherlands, Macedonia, Bosnia and Herzegovina, Serbia, Montenegro, Albania, Moldova, Martinique, F.Guiana, Guadeloupe, Cyprus, Malta, Ireland, UK, Taiwan, Tahiti, Vanuatu, Iran, UAE, Lebanon, Israel, Algeria, Libya, Tunisia, Madagascar, Guatemala, Bolivia, Uruguay, Honduras, Nicaragua, Aruba, St. Martin, Singapore, Hong Kong, Malaysia, Brunei, Macau, Mauritius, South Africa, Jamaica, Barbados, Grenada, ST. Lucia, ST. Vincent, Antigua, Suriname, Mongolia, Seychelles
Premium unleaded fuel (within E85)	95 or above	Thailand
Regular unleaded fuel (Conforming to Fuel Quality Standards Act 2000)^*2	92 or above	Egypt, Myanmar
	90 or above	The Philippines, Marshall Islands, Ustt^*3, Kuwait, Oman, Qatar, Saudi Arabia, Syria, Bahrain, Jordan, Nigeria, Angola, Chile, El Salvador, Costa Rica, Ecuador, Haiti, Colombia, Dominican Republic (LHD), Panama, Peru, B.Virgin, Curacao, Indonesia, Nepal, Sri Lanka, Fiji, Papua New Guinea, Kenya, Zimbabwe, Trinidad and Tobago, Commonwealth of Dominica, Cambodia, Iraq, Ivory Coast, Australia, Laos, Cameroon, Burundi, Gabon, Ghana, Tanzania, Mozambique

*1 :Europe

*2 :Australia

*3 :Republic of Palau & Federated States of Micronesia

Item					Specification
Item					SKYACTIV-G 2.0	SKYACTIV-G 2.5
MECHANICAL
Type					Gasoline, 4-cycle
Cylinder arrangement and number					In-line, 4-cylinder
Combustion chamber					Pentroof
Valve system					DOHC, timing chain driven, 16 valves
Displacement		(ml {cc})			1,998 {1,998}	2,488 {2,488}
Bore × stroke		(mm {in})			83.5 × 91.2 {3.29 ×3.59}	89.0 × 100 {3.50 × 3.94}
Compression ratio [European (L.H.D. U.K.) specs.]					14.0:1	13.0:1
Compression ratio [Except European (L.H.D. U.K.) specs.]					13.0:1/14.0:1	13.0:1
Valve timing		IN	Open	BTDC (°)	-32―42
		IN	Closed	ABDC (°)	110―36
		EX	Open	BBDC (°)	54―9	58―13
		EX	Closed	ATDC (°)	7―52	6―51
LUBRICATION SYSTEM
Type					Force-fed type
Oil pressure (reference value) [Water temperature 80―90 degrees C]				(kPa {kgf/cm², psi}[rpm])	Low oil pressure: 110―175 {1.13―1.78, 16.0―25.3}[1,500] High oil pressure: 300―430 {3.06―4.38, 43.6―62.3}[4,500]
Oil pump	Type				Trochoid gear type
Oil filter	Type				Full-flow, paper element
Oil filter	Bypass pressure		(kPa {kgf/cm², psi})		78—118 {0.80—1.20, 12.0—17.1}
Oil capacity (approx. quantity)	Total (dry engine)		(L {US qt, lmp qt})		Without oil cooler: 4.9 {5.2, 4.3} With oil cooler: 5.0 {5.3, 4.4}	5.4 {5.7, 4.8}
	Oil replacement		(L {US qt, lmp qt})		4.0 {4.2, 3.5}	4.3 {4.5, 3.8}
	Oil and oil filter replacement		(L {US qt, lmp qt})		4.2 {4.4, 3.7}	4.5 {4.8, 4.0}
COOLING SYSTEM
Type					Water-cooled, Electromotive
Water pump		Type			Centrifugal, V-ribbed belt-driven
Thermostat		Type			Wax type
		Opening temperature		(°C {°F})	80.5―83.5 {177―182}
		Full-open temperature		(°C {°F})	95 {203}
		Full-open lift		(mm {in})	8.5 {0.33} or more
Radiator		Type			Corrugated fin type
Cooling system cap		Valve opening pressure		(kPa {kgf/cm², psi})	93.2―122.6 {0.951―1.250, 13.6―17.7}
Cooling fan		Type			Electric type
		Number of blades			Cooling fan No.1: 5 Cooling fan No.2: 7
		Outer diameter		(mm {in})	320 {12.6}
		Cooling fan motor output		(W)	80
FUEL SYSTEM
Fuel injector			Type		High resistance
			Fuel supply method		Top-feed
			Drive types		Electronic type
Pressure regulator control pressure			(kPa {kgf/cm², psi})		Approx. 430 {4.38, 62.4}
Fuel pump		Type			Electric
Fuel tank		Capacity (L {US gal, lmp gal})		2WD	56.0 {14.8, 12.3}
Fuel tank		Capacity (L {US gal, lmp gal})		4WD	58.0 {15.3, 12.8}
EMISSION SYSTEM
Catalyst		Type			WU-TWC (monolith) TWC (monolith)
EVAP control system		Type			Charcoal canister type
PCV system		Type			Closed type
CHARGING SYSTEM
Battery		Voltage		(V)	12
		Type (with i-stop)			Q-85
		Type and capacity (without i-stop)		(A·h/5HR, A·h/20HR)	55D23L (48, 55) 75D23L (52, 65)
Generator		Output		(V-A)	12-100
		Regulated voltage			Controlled by PCM
		Self diagnosis function			Controlled by PCM
IGNITION SYSTEM
Ignition system		Type			SEI
		Spark advance			Electronic
		Firing order			1—3—4—2 (all cylinders independent firing)
		Firing order
Spark plug		Type			PE5R-18-110 PE5S-18-110
STARTING SYSTEM
Starter		Type			Coaxial reduction
		Output		(kW)	Without i-stop: 1.0	1.4
		Output		(kW)	With i-stop: 1.4	1.4
CONTROL SYSTEM
i-stop OFF switch					ON/OFF
Neutral switch					ON/OFF
CPP switch					ON/OFF
MAF sensor					Hot film
IAT sensor					Cold resistor
MAP sensor					Sealant diaphragm
TP sensor					Hall element
APP sensor					Hall element
CKP sensor					MR (Magnetic Resistance) element
CMP sensor					GMR element
ECT sensor					Thermistor
BARO sensor					Piezoelectric element
Fuel pressure sensor					Metal diaphragm
KS					Piezoelectric element
Current sensor					Shunt resistance, Thermistor
A/F sensor					Zirconia element
HO2S					Zirconia element
Clutch stroke sensor					Hall element
Power brake unit vacuum sensor					Piezoelectric element