For the 1984 Peugeot 604 with the 2.3L 4-cylinder Diesel Turbo engine, the oil capacity is 5.3 quarts (with filter). The recommended viscosity for all temperatures is 10W-40, or 15W-40 for temperatures above -10°C. AMSOIL recommends using Signature Series 5W-40 100% Synthetic Max-Duty Diesel Oil (DEOQT-EA) for outstanding extreme-pressure protection.
What oil does a 1984 Peugeot 604 2.3L Diesel Turbo take?
The engine requires an oil with a CF specification. For optimal performance across various climates, the AMSOIL lookup recommends a viscosity of 10W-40 for all temperatures, or 15W-40 when operating in environments above -10°C.
AMSOIL product recommendations
Based on the AMSOIL lookup data, here are the recommended fluids for your 1984 Peugeot 604 Diesel Turbo.
Engine Oil Options
| Product Name | Code |
|---|---|
| AMSOIL Signature Series 5W-40 100% Synthetic Max-Duty Diesel Oil | DEOQT-EA |
| AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil | ADOQT-EA |
Transmission & Differential Fluids
| Component | Product Name | Code |
|---|---|---|
| Automatic Transmission | AMSOIL Signature Series Multi-Vehicle 100% Synthetic ATF | ATFPK-EA |
| Automatic Transmission | AMSOIL OE Multi-Vehicle 100% Synthetic ATF | OTFQT-EA |
| Manual Transmission | AMSOIL Premium Protection 10W-40 100% Synthetic Motor Oil | AMOQT-EA |
| Manual Transmission | AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil | XLOQT-EA |
| Rear Differential | AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube | AGLPK-EA |
Coolant & Brake Fluid
| Component | Product Name | Code |
|---|---|---|
| Engine Coolant | AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| Engine Coolant | AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
| Clutch/Brake Fluid | AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid | BFLVCN-EA |
Engine Oil Specifications
| Viscosity | Oil Grade (Lookup) |
|---|---|
| 10W-40 (All TEMPS) | CF |
| 15W-40 (Above -10°C) | CF |
Engine Oil Capacity
| Condition | Capacity |
|---|---|
| With Filter Change | 5.3 quarts |
Note: Always check the oil level after refilling.
Transmission and Differential Fluid Specifications
The 1984 Peugeot 604 features different requirements for automatic and manual transmissions, as well as the rear differential.
Automatic Transmission (3HP-22)
| Fill Type | Capacity |
|---|---|
| Initial Fill | 1.7 quarts |
| Total Fill | 5.5 quarts |
The AMSOIL lookup note references the 3HP-22 transmission specification for this application.
Manual Transmission (BA 7/5 5-SPD)
| Specification | Viscosity |
|---|---|
| SJ All TEMPS | 10W-40 |
The capacity for the manual transmission is 3.4 pints.
Rear Differential
| Specification | Viscosity |
|---|---|
| GL-5 (All TEMPS) | 80W-90 |
Note: Fill with oil designated for use in limited slip differentials. The rear differential capacity is 3.4 pints.
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL product from this lookup | How it may help | Important limitation |
|---|---|---|---|---|
| Engine Wear | Diesel engines face high pressure and friction. | DEOQT-EA | Delivers up to 6X more wear protection. | Requires regular maintenance. |
| Extreme Temperatures | Viscosity changes can affect lubrication. | ADOQT-EA | Excels in extreme temperatures. | Not confirmed for all specific climates. |
| Differential Wear | High torque can cause gear degradation. | AGLPK-EA | Provides advanced protection against wear. | Must be compatible with limited slip if used. |
Diesel maintenance notes for this vehicle
- Oil Filter: No specific AMSOIL recommendations available in the source data.
- Air Filter: No specific AMSOIL recommendations available in the source data.
- Coolant Capacity: 10.6 quarts.
- Turbocharger Health: For mid-1980s diesel engines, monitoring turbocharger boost pressures is a recommended maintenance topic.
Common maintenance concerns for this vehicle
Owners of the 1984 Peugeot 604 Diesel should consider the following practical checks:
- Cooling System: Given the age of these vehicles, maintaining cooling system integrity is vital.
- Fuel System: Monitoring fuel injection integrity and performing fuel system priming may be necessary.
- Glow Plugs: Regular checks on glow plug functionality are important for diesel starting reliability.
Recall, TSB, and manufacturer communication notes
Official NHTSA recall research for the 1984 Peugeot 604 returned no recall records. However, owners should always verify open recalls by VIN, as applicability can depend on production date, trim, and specific equipment.
About this vehicle
The 1984 Peugeot 604 represents the final years of production for Peugeot’s executive-class saloon. This model line ran from 1975 to 1985 and was designed to compete in the large luxury saloon market. The 604 is often recognized for its Pininfarina-designed styling and its relationship to the Peugeot 504 platform.
This specific vehicle features a 2.3L diesel turbo configuration. While the 604 was known for its “calm elegance,” maintaining a high-mileage diesel from this era requires attention to cooling systems, fuel injection integrity, and turbocharger health. Because the 604 shares architectural DNA with the robust Peugeot 504—a car renowned for durability in rough-terrain environments—certain suspension and chassis components may share commonalities.
Owners should prioritize researching the availability of specialized diesel engine components due to the vehicle’s age. It is highly recommended to cross-reference all technical specifications with a dedicated Peugeot workshop manual to ensure accuracy in parts procurement, as official documentation for specific engine codes can vary by region.
Common questions about this vehicle’s diesel oil and maintenance
How much oil does my 1984 Peugeot 604 Diesel Turbo take?
It takes 5.3 quarts of oil when performing a change that includes the filter.
What is the correct oil viscosity for all temperatures?
The AMSOIL lookup recommends 10W-40 for all temperatures, or 15W-40 if you are operating in temperatures above -10°C.
Can I use synthetic oil in my Peugeot 604 diesel?
Yes, AMSOIL offers options like the Signature Series 5W-40 (DEOQT-EA) which is designed for max-duty diesel applications.
What should I use for my manual transmission?
For the BA 7/5 (5-SPD) manual transmission, a 10W-40 viscosity is recommended. AMSOIL lists Premium Protection 10W-40 (AMOQT-EA) as an option.
How much coolant does the engine hold?
The cooling system capacity is 10.6 quarts.
Are there any recalls for the 1984 Peugeot 604?
NHTSA research returned no specific recall records for this model, but you should always verify your specific VIN with a dealer or manufacturer to check for open recalls.
Disclaimer: Not all information is confirmed from source data. Always consult your original manufacturer’s service manual or a certified mechanic before performing maintenance.