For the 1981 Peugeot 504 with the 2.3L 4-cylinder XD2C 3 Diesel engine, the oil capacity is 5.3 quarts (including filter replacement). The recommended oil viscosity for all temperatures is 10W-40, or 15W-40 for temperatures above -10°C. AMSOIL recommends Signature Series 5W-40 100% Synthetic Max-Duty Diesel Oil (DEOQT-EA) for superior wear protection and efficiency.
What oil does a 1981 Peugeot 504 2.3L Diesel take?
The 1981 Peugeot 504 with the XD2C engine requires an oil grade of CF. For optimal performance across various climates, use a 10W-40 viscosity for all temperatures. If operating in environments where temperatures stay above -10°C, a 15W-40 viscosity is also appropriate.
AMSOIL product recommendations
Based on the specific requirements for the 1981 Peugeot 504 2.3L Diesel, AMSOIL provides several high-performance lubrication options to maintain engine and drivetrain health.
Engine Oil Recommendations
| Product Name | Viscosity | Part Code |
|---|---|---|
| AMSOIL Signature Series Max-Duty Diesel Oil | 5W-40 | DEOQT-EA |
| AMSOIL Heavy-Duty 100% Synthetic Diesel Oil | 5W-40 | ADOQT-EA |
Transmission & Differential Recommendations
| Component | Product Name | Part Code |
|---|---|---|
| Automatic Transmission | Signature Series Multi-Vehicle ATF | ATFPK-EA |
| Automatic Transmission | OE Multi-Vehicle ATF | OTFQT-EA |
| Manual Transmission | Premium Protection 10W-40 | AMOQT-EA |
| Manual Transmission | Extended-Life 10W-40 | XLOQT-EA |
| Rear Differential | Severe Gear 80W-90 | AGLPK-EA |
Coolant & Brake Fluid
| Component | Product Name | Part Code |
|---|---|---|
| Engine Coolant | Passenger Car & Light Truck Antifreeze | ANTPC1G-EA |
| Engine Coolant | Propylene Glycol Antifreeze | ANT1G-EA |
| Clutch/Brake Fluid | DOT 3 and DOT 4 Synthetic Brake Fluid | BFLVCN-EA |
Engine Oil Specifications
| Specification | Detail |
|---|---|
| Oil Grade | CF |
| Viscosity (All Temps) | 10W-40 |
| Viscosity (Above -10°C) | 15W-40 |
Engine Oil Capacity
| Condition | Capacity |
|---|---|
| With Filter Change | 5.3 quarts |
Note: Always check the oil level after refilling.
Manual and Automatic Transmission Specifications
The transmission requirements vary significantly depending on whether your Peugeot 504 is equipped with a manual or automatic gearbox.
Automatic Transmission (3HP-22)
| Measurement | Capacity |
|---|---|
| Total Fill | 5.5 quarts |
| Initial Fill | 1.7 quarts |
The AMSOIL lookup note references the 3HP-22 transmission for this application.
Manual Transmission (U/K)
| Specification | Detail |
|---|---|
| Viscosity | 10W-40 (All TEMPS) |
| Capacity | 2.5 pints |
Differential and Clutch Fluid Details
Proper lubrication of the rear differential is critical for maintaining the drivetrain components of this classic Peugeot.
Rear Differential
| Specification | Detail |
|---|---|
| Viscosity/Grade | GL-5, 80W-90 or 80W (All TEMPS) |
| Capacity | 3.4 pints |
Clutch/Brake Fluid
For the clutch system, the vehicle requires Hydraulic Brake Fluid, DOT 4 (Recommended for: HBH).
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL product | How it may help | Limitation |
|---|---|---|---|---|
| Engine Wear | Diesel engines face high pressure and friction. | DEOQT-EA | Delivers up to 6X more wear protection. | Requires regular monitoring. |
| 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. | Diagnosis may be required for existing damage. |
Diesel maintenance notes for this vehicle
- Oil Level: Always check the oil level after refilling following a filter change.
- Filter Replacement: While AMSOIL provides filter categories, specific part numbers for the 1981 Peugeot 504 are not confirmed from source data; verify via your vehicle’s manual.
- Coolant Mixing: If using concentrated AMSOIL Propylene Glycol Antifreeze (ANT1G-EA), it requires mixing with distilled or high-quality water.
About this vehicle
The 1981 Peugeot 504 represents a significant era in Peugeot’s history, characterized by robust engineering and global versatility. As part of the 504 lineage, which was produced from 1968 to 1983, this vehicle is recognized for its durable body structure and specialized suspension design featuring long travel and high ground clearance. These characteristics made the 504 particularly successful in rough-terrain environments across Africa and Latin America, earning it a reputation as a reliable ‘workhorse.’
Regarding the specific powertrain, this vehicle is equipped with a 2.3L 4-cylinder diesel engine (Engine Code: XD2C). Peugeot’s diesel offerings during this era were central to the model’s widespread popularity in developing markets. Owners of these vintage diesel units should focus their maintenance research on fuel system integrity, cooling efficiency, and the management of high-mileage components common to heavy-duty French diesels of the late 1970s and early 1980s.
Because this specific engine configuration (2.3L XD2C) is highly specialized, it is recommended that owners verify broader model and engine-family technical manuals before performing deep mechanical work. Maintenance context for this vehicle typically involves monitoring the torque tube driveshaft system—a unique feature of the 504 designed to relieve drivetrain torque reactions—and ensuring that the rear-wheel-drive components are well-lubricated.
Recall, TSB, and manufacturer communication notes
Official NHTSA recall research for the 1981 Peugeot 504 returned no records. Additionally, no consumer complaints were found in the NHTSA database for this specific year and model. However, owners should always verify open recalls by VIN, as applicability can depend on production date, trim, and equipment.
Common questions about this vehicle’s diesel oil and maintenance
How much oil does my 1981 Peugeot 504 2.3L Diesel take?
It takes approximately 5.3 quarts of oil when performing a service that includes a filter change.
What is the correct viscosity for the XD2C diesel engine?
The AMSOIL lookup recommends 10W-40 for all temperatures, or 15W-40 if operating above -10°C.
Can I use synthetic oil in this vintage diesel?
Yes, AMSOIL offers options like the Signature Series DEOQT-EA which is designed to provide superior wear protection for diesel engines.
What should I use for the manual transmission?
The manual transmission (U/K) requires a 10W-40 viscosity. AMSOIL lists AMOQT-EA as a suitable synthetic option.
How often should I change the coolant?
AMSOIL products like ANTPC1G-EA provide protection for up to 150,000 miles or 5 years, whichever comes first.
How do I check for active recalls on my Peugeot?
While no NHTSA records were found for this model, you should always verify current recalls by checking your specific VIN with a Peugeot dealer or official manufacturer database.
Disclaimer: Not all information is confirmed from source data. Always consult your vehicle’s owner manual and verify specifications via VIN before performing maintenance.