Mazda2003–2008Technical specifications

RX-8 1.3: Technical specifications

Workshop data for the 1.3-litre petrol (engine code 13B). Covers engine, fluids, brakes, service, torques and air conditioning: the figures to check before a job or a parts order.

Common faults & fixes

Summary

Match the engine code (13B) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Mazda
Model: RX-8
Years: 2003–2008
Fuel: Petrol
Engine code: 13B

Performance & efficiency

Power: 141 kW (192 hp)
Engine size: 1,308 cc
Cylinders: 2
Compression ratio: 10.0:1
Fuel system: Mazda

Fluids & capacities

Engine oil (with the filter): 3.5 litres

All 103 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	2
Capacity (Fiscal) cc	1308
Compression ratio :1	10,0
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Make	Mazda
Ignition system Type	DLI
Fuel system Make	Mazda
Fuel system Description	MFI-s
Air metering Type	Mass
Combined ignition and fuel ECM	Yes
Diagnostic socket	Yes

Ignition system

Ignition coil supply voltage + with ballast V	12,0

Engine oil & fluids

Engine oil

The Mazda RX-8 1.3 (2003–2008) takes 3.5 litres of engine oil with the filter.

See the reference table for the complete engine oil entries and their conditions.

Manual gearbox

The manual gearbox has a listed capacity of 2.5 litres. The specified oil is SAE 75W-90, with classification GL-5.

Coolant

The listed total cooling-system capacity is 9.8 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	All temperatures
Engine oil grade SAE	5W-30
Engine oil classification API/ACEA	SJ/A1, A3, A5
Ambient temperature range	All temperatures
Engine oil grade SAE	10W-30
Engine oil classification API/ACEA	SJ/A1, A3, A5
Engine with filter(s) litres	3.5
Other lubricants and capacities
Manual transmission oil grade SAE	75W-90
Manual transmission oil classification	GL-5
Manual transmission litres	2.5
Automatic transmission fluid Type	ATF M-III/Dexron II
Automatic transmission (drain & refill) litres	8.7
Differential oil grade - rear SAE	75W-90 Semi-synthetic
Differential oil classification - rear	GL-5
Differential rear litres	1.3
Cooling system - total capacity litres	9.8
Brake fluid Type	DOT 3/4

Brakes & wear limits

Brake disc thickness

Brake discs on the Mazda RX-8 1.3 (2003–2008) are replaced at a minimum thickness of 22 mm (ventilated) front and 16 mm rear.

Minimum disc thickness for replacement - ventilated Front	22 mm
Minimum disc thickness for replacement Rear	16 mm

Brake disc and drum dimensions

Disc thickness variation Front	0,015 mm
Disc thickness variation Rear	0,015 mm
Disc runout Front	0,05 mm
Disc runout Rear	0,05 mm
Minimum pad thickness Front	2 mm
Minimum pad thickness Rear	2 mm
Parking brake travel No. of notches	1-3

Service & electrical

Ignition timing

The ignition timing on the Mazda RX-8 1.3 (2003–2008) is not adjustable.

Ignition timing - basic BTDC °Engine/rpm	Not adjustable

Battery

The Mazda RX-8 1.3 (2003–2008) uses a 12 V, 70 Ah battery.

Battery V/RC(Ah)	12 (70)

Tuning and emissions

Ignition advance checks °Engine/rpm	ECM Controlled
Idle speed rpm	800±50 Not adjustable
Idle speed - alternative rpm	AT=810±50 Not adjustable
Oil temperature °C	80
CO level at idle speed - tailpipe Vol. % CO	0,5 Max Not adjustable
HC level at idle speed ppm	100
CO2 level at idle speed Vol. % CO2	14,5-16
O2 level at idle speed Vol. % O2	0,1-0,5
Increased idle speed for CO test rpm	2800-3100
CO content at increased idle speed Vol. %	0,3
Lambda at increased idle λ	0,98-1,02

Starting and charging

Maximum cranking amps A	210
Alternator output A/V/rpm	97/12/2000

Service checks and adjustments

Compression pressure bar	6,8-8,2
Oil pressure bar/rpm	3,5/3000
Radiator cap bar	0,70-1,00
Thermostat opens °C	80-84
Drive belt tension - alternator/PAS/AC mm	4,5-5,0
Drive belt tension - AC mm	3,3-4,0

Fuel system

Fuel pump delivery pressure bar	3,9-4,5
Engine coolant temperature (ECT) sensor Ohm/°C	287-349/80
Injector Ohm	13,8
Lambda sensor (Oxygen) heater Ohm	2,2-2,9

Spark plugs

Spark plugs Original equipment	NGK
Spark plug Type	—
Electrode gap mm	1,05-1,15
Spark plugs Make	NGK
Spark plug Type	—
Electrode gap mm	1,05-1,15

Tightening torques

Other engine tightening torques
Oil pump to cylinder block	12±2 Nm
Sump bolts	11±1 Nm
Sump drain bolt	35±5 Nm
Flywheel/driveplate	—
Flywheel/driveplate
Clutch pressure plate	23±4 Nm
Inlet manifold to cylinder head	22±3 Nm
Exhaust manifold to cylinder head	51±9 Nm
Exhaust downpipe to manifold	45±6 Nm
Water pump	23±3 Nm
Spark plugs	16±2 Nm
Engine coolant temperature (ECT) sensor	20±3 Nm
Lambda sensor (Oxygen)	39±10 Nm
Knock sensor (KS)	20±5 Nm
Engine oil pressure switch	15±3 Nm
Chassis tightening torques
Front hub - wheel bearing housing bolts	57±3 Nm
Rear hub	255±20 Nm
Bolts/nuts
Steering wheel	45±4 Nm
Steering rack/box mounting	90±15 Nm
Brake disc to hub Front	13±2 Nm
Brake caliper to carrier Front	27±4 Nm
Brake caliper/carrier to hub Front	90±12 Nm
Brake caliper to carrier Rear	27±4 Nm
Brake caliper/carrier to hub Rear	59±10 Nm
ABS sensor Front	11±2 Nm
ABS sensor Rear	22±3 Nm
Road wheels	103±15 Nm

Air conditioning

No. of AC service connectors	2
Air conditioning restrictor type	Expansion valve
Compressor clutch/magnetic coupling	Yes
Compressor variable displacement solenoid	No
Air conditioning refrigerant Type	R134a
Air conditioning refrigerant quantity grams	430
Air conditioning oil group	PAG
Air conditioning oil Type	Dens Oil 8
Air conditioning oil quantity cm³	60
Air conditioning oil viscosity ISO	46

Frequently asked questions

How much oil does the Mazda RX-8 1.3 take?

The Mazda RX-8 1.3 (2003–2008) takes 3.5 litres of engine oil with the filter. See the reference table for the complete engine oil entries and their conditions.

What is the ignition timing for the Mazda RX-8 1.3?

The ignition timing on the Mazda RX-8 1.3 (2003–2008) is not adjustable.

What is the minimum brake disc thickness for the Mazda RX-8 1.3?

Brake discs on the Mazda RX-8 1.3 (2003–2008) are replaced at a minimum thickness of 22 mm (ventilated) front and 16 mm rear.

What battery does the Mazda RX-8 1.3 use?

The Mazda RX-8 1.3 (2003–2008) uses a 12 V, 70 Ah battery.