Vehicle database
MITSUBISHI Diamante
3rd generation / Second generation / 1996-2003 / Sedan / Sedan / Wagon
Japan, North America, Australia (select markets)Japan, North America, Australia, selected Asian marketsCoverage: expanded
Year and trim selector
Choose the exact year and trim to see engine, oil and service details.
1996 MITSUBISHI Diamante 6G72/6G73 (F31A)
F31A / 6G72, 6G73, 6G74 / Available with a 3.0L SOHC V6 (6G72), a 2.5L SOHC V6 (6G73 - Japan), and a 3.5L SOHC V6 (6G74 - mainly Australia). Variations in power output depending on market and emission regulations.
SilverOpen details
Oil type: API SG or higher grade oil; SAE 5W-30 recommended in temperate climatesOil capacity: Approximately 4.5L service-fill including filter (varies by engine)Related: P0300, P0420, P0171, P0455
2003 MITSUBISHI Diamante 6G74/6G72 (F31A)
F31A / 6G74, 6G72, 4G64 / Available engines for 2003 included a 3.5L SOHC V6 (6G74), 3.0L SOHC V6 (6G72) mainly in Japan, and a 2.4L SOHC inline-4 (4G64) in some Asian markets.
GoldOpen details
Oil type: SAE 5W-30 API SM or higherOil capacity: Approximately 4.1 liters (service-fill and filter change) for 6G74 V6Related: P0300, P0420, P0171, P0455
Engine codes by year
| Year | Trim | Engine codes | Displacement | Fuel system |
|---|---|---|---|---|
| 1996 | technical-profile | 6G72, 6G73, 6G74 | 2498cc (6G73), 2997cc (6G72), 3494cc (6G74) | Multi-point fuel injection |
| 2003 | technical-profile | 6G74, 6G72, 4G64 | 2351-3496 cc depending on engine | Electronic fuel injection |
Oil capacity by engine
| Year | Engine codes | Oil type | Oil capacity | Fluid |
|---|---|---|---|---|
| 1996 | 6G72, 6G73, 6G74 | API SG or higher grade oil; SAE 5W-30 recommended in temperate climates | Approximately 4.5L service-fill including filter (varies by engine) | Mitsubishi SP-III or equivalent automatic transmission fluid |
| 2003 | 6G74, 6G72, 4G64 | SAE 5W-30 API SM or higher | Approximately 4.1 liters (service-fill and filter change) for 6G74 V6 | Mitsubishi MZ320 or equivalent automatic transmission fluid |
Technical specifications
- Engines: 6G72, 6G73, 6G74, 4G64
- Transmissions: 5-speed manual (limited markets, mainly Japan/Australia), 4-speed automatic, Mitsubishi SP-III or equivalent automatic transmission fluid, 5-speed manual available in some markets and engine versions, 4-speed or 5-speed automatic depending on engine and market, Mitsubishi MZ320 or equivalent automatic transmission fluid
- Tire sizes: 205/65R15, 215/60R15, 215/55R16 (market dependent), 215/60R16, 225/55R16
- Bolt pattern: Verify by exact trim and wheel package
- Wheel torque: Verify by VIN and wheel package
- Battery: Verify by engine, market and equipment package
Fluids and service data
- Engine oil: API SG or higher grade oil; SAE 5W-30 recommended in temperate climates / SAE 5W-30 API SM or higher
- Transmission fluid: Mitsubishi SP-III or equivalent automatic transmission fluid / Mitsubishi MZ320 or equivalent automatic transmission fluid
- Coolant: Around 8.5L / Approximately 8 liters (varies by engine variant)
- Brake fluid: DOT 3 or DOT 4
Known problems
- Timing belt wear requiring periodic replacement
- Cooling system leaks in older units
- Timing belt wear leading to engine damage if not replaced per schedule
- Suspension component wear causing ride comfort issues
- Electrical issues with power windows and door locks in high-mileage units