What oil does a 1982 Pontiac Bonneville 5.7L Diesel take?
For the 1982 Pontiac Bonneville with the 5.7L 8-cylinder Engine Code [N] Diesel, the engine requires an oil viscosity of 10W-30 for temperatures below 16°C, 15W-40 for temperatures between -18 to 16°C, or 30 for temperatures above 0°C (preferred for continuous driving). The total oil capacity is 7 quarts with a filter change. AMSOIL recommends using Signature Series Max-Duty Synthetic Diesel Oil.
AMSOIL product recommendations
Based on the vehicle specifications, the following AMSOIL products are recommended for your maintenance needs:
Engine Oil & Filter
| Product Name | Code |
|---|---|
| AMSOIL Signature Series 10W-30 100% Synthetic Max-Duty Diesel Oil | DTTQT-EA |
| AMSOIL 10W-30 Heavy-Duty 100% Synthetic Diesel Oil | ADNQT-EA |
| AMSOIL Signature Series 5W-30 100% Synthetic Max-Duty Diesel Oil | DHDQT-EA |
| AMSOIL Oil Filter | EAO64-EA |
Coolant & Transmission Fluid
| Product Name | Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
| AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
| AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
Engine Oil Specifications & Details
Proper lubrication is critical for the longevity of the 5.7L diesel engine. Ensure you match the viscosity to your operating environment.
Oil Viscosity Guide
| Temperature Range | Recommended Viscosity |
|---|---|
| Below 16°C | 10W-30 |
| -18 to 16°C | 15W-40 |
| Above 0°C | 30 (Preferred for continuous driving) |
Capacity and Torque
| Specification | Value |
|---|---|
| Oil Capacity (with filter) | 7 quarts |
| Oil Drain Plug Torque | 20 ft/lbs |
| Oil Grade | CF |
Note: After refilling, always check the oil level.
Automatic Transmission Fluid Specifications
The 1982 Bonneville uses specific transmission configurations. Note that manufacturer technical service bulletins have updated specifications for these units.
THM350C Transmission
| Specification | Detail |
|---|---|
| Fluid Type | AF6 (Updated from Dexron II or III to Dexron VI) |
| Total Fill Capacity | 10 quarts |
| Initial Fill Capacity | 3 quarts |
THM250C Transmission
| Specification | Detail |
|---|---|
| Fluid Type | AF6 (Updated from Dexron II or III to Dexron VI) |
| Total Fill Capacity | 10.8 quarts |
| Initial Fill Capacity | 4 quarts |
Coolant Specifications
Maintaining the cooling system is vital for this heavy vehicle to prevent overheating.
| Specification | Detail |
|---|---|
| Capacity | 17.4 quarts |
AMSOIL offers two options: a 50/50 pre-mix (ANTPC1G-EA) or a concentrated propylene glycol version (ANT1G-EA) which requires mixing with distilled or high-quality water.
Diesel maintenance notes for this vehicle
- Fuel System Integrity: Diesel engines of this era are sensitive to fuel quality. Strict adherence to filter replacement intervals is necessary to prevent injector issues.
- Cooling System: Due to the significant weight of full-size Pontiacs, maintaining an efficient cooling system is vital for engine longevity.
- Fluid Selection: It is critical to use lubricants that meet specific diesel requirements rather than standard gasoline-engine products.
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 combustion creates high pressure and friction. | Signature Series Diesel Oil | Delivers up to 6X more wear protection. | Requires proper service intervals. |
| Extreme Temperatures | Viscosity changes can affect lubrication during starts or heavy use. | Signature Series Diesel Oil | Excels in extreme temperatures and maintains viscosity. | Not confirmed from source data. |
| Contaminants | Small particles can cause significant internal damage. | AMSOIL Oil Filter | 99% efficiency at 20 microns; greater capacity for wear-causing contaminants. | Not confirmed from source data. |
Common maintenance concerns for this vehicle
Based on owner reports and historical context, owners should monitor the following:
- Overheating: There have been consumer reports of continuous overheating issues during driving. Ensure the cooling system is fully functional.
- Fuel Injection System: The governor weight retainer in the injection pump may be a point of failure in certain conditions.
Recall, TSB, and manufacturer communication notes
NHTSA Recall Information: A recall was identified for the Fuel Injection System (Campaign 82V012000). The governor weight retainer in the injection pump may fail, potentially causing the throttle valve to stick. The remedy involves dealer replacement of the assembly.
Disclaimer: Always verify current open recalls by using your specific VIN through official manufacturer channels or the NHTSA website.
About this vehicle
The 1982 Pontiac Bonneville represents a significant era in General Motors’ history, marking a transition between traditional full-size platforms and new engineering directions. Historically, the Bonneville nameplate was inspired by the Bonneville Salt Flats and served as one of Pontiac’s primary full-size offerings.
This specific model features the 5.7L 8-cylinder diesel engine (Engine Code [N]). During this period, GM was experimenting with various powertrain options to meet changing fuel economy standards. Because these vehicles are often large-format and can reach weights of 5,000 pounds or more, they place unique demands on the powertrain and cooling systems.
Owners of diesel-powered Pontiacs from this era typically focus on specialized maintenance requirements that differ significantly from standard gasoline V8 engines. Because diesel engines operate under different thermal and pressure profiles, maintenance research should prioritize fuel system integrity and specialized filtration needs. It is highly recommended to cross-reference all technical specifications with a dedicated workshop manual for the 5.7L ‘N’ code engine to ensure absolute accuracy during service.
Common questions about this vehicle’s diesel oil and maintenance
How much oil does my 1982 Bonneville 5.7L Diesel take?
The capacity is 7 quarts when performing an oil change with a new filter installed.
What is the recommended oil viscosity for summer driving?
For temperatures above 0°C, a viscosity of 30 is preferred for continuous driving.
Can I use standard gasoline engine oil in this diesel?
No. It is critical to use oils that meet the specific requirements for diesel combustion, such as the CF grade specified in the lookup data.
What should I do if my transmission is listed as Dexron II or III?
The manufacturer’s Technical Service Bulletin indicates this specification has been updated to Dexron VI for the THM350C and THM250C transmissions.
How often should I change my diesel oil filter?
While specific intervals are not provided, using high-efficiency filters like the AMSOIL EAO64-EA can help manage wear-causing contaminants more effectively.
Is there a recall for my 1982 Pontiac Bonneville?
NHTSA records show a recall regarding the fuel injection system’s governor weight retainer. You should verify your specific VIN with a dealer to confirm if this applies to your vehicle.
Disclaimer: The information provided is based on available source data and is intended for educational purposes. Always consult your owner’s manual or a certified professional before performing maintenance.