For the 1982 Pontiac Grand Prix with the 5.7L 8-cylinder Diesel engine (Code N), the oil capacity is 7 quarts (including filter replacement). Recommended viscosities include 10W-30 for temperatures below 16°C, 15W-40 for -18 to 16°C, and 30 weight for continuous driving above 0°C. AMSOIL recommends using Signature Series 10W-30 Max-Duty Diesel Oil paired with an AMSOIL Oil Filter (EAO64-EA).
What oil does a 1982 Pontiac Grand Prix 5.7L Diesel take?
This vehicle requires an oil with a CF grade specification. Depending on your operating environment, you should select the appropriate viscosity: 10W-30 for temperatures below 16°C, 15W-40 for temperatures between -18 to 16°C, or a 30 weight oil if you are engaged in continuous driving above 0°C.
AMSOIL product recommendations
The following AMSOIL products are specifically listed for the 1982 Pontiac Grand Prix 5.7L Diesel engine to support optimal performance and protection.
Engine Oil Options
| Product Name | Viscosity | Code |
|---|---|---|
| AMSOIL Signature Series Max-Duty Diesel Oil | 10W-30 | DTTQT-EA |
| AMSOIL 10W-30 Heavy-Duty Synthetic Diesel Oil | 10W-30 | ADNQT-EA |
| AMSOIL Signature Series Max-Duty Diesel Oil | 5W-30 | DHDQT-EA |
Note: Oil Grade is CF.
Oil Filter
| Product Name | Code |
|---|---|
| AMSOIL Oil Filter | EAO64-EA |
Coolant & Antifreeze
| Product Name | Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze/Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze/Coolant | ANT1G-EA |
Automatic Transmission Fluid
| Product Name | Code |
|---|---|
| AMSOIL Signature Series Fuel-Efficient ATF | ATLPK-EA |
| AMSOIL OE Fuel-Efficient ATF | OTLQT-EA |
Engine Oil Specifications
| Specification | Details |
|---|---|
| Oil Grade | CF |
| Drain Plug Torque | 20 ft/lbs |
Engine Oil Capacity
| Condition | Capacity |
|---|---|
| With Filter Change | 7 quarts |
Note: Always check the oil level after refilling.
Automatic Transmission Fluid Specifications
The transmission requirements depend on your specific unit (THM250C or THM350C). The manufacturer’s technical service bulletin has updated the specification from Dexron II or III to Dexron VI.
THM250C Transmission
| Fill Type | Capacity |
|---|---|
| Total Fill | 10.8 quarts |
| Initial Fill | 4 quarts |
THM350C Transmission
| Fill Type | Capacity |
|---|---|
| Total Fill | 10 quarts |
| Initial Fill | 3 quarts |
Coolant Specifications
The cooling system capacity for this vehicle is 17.4 quarts. AMSOIL offers both a pre-mix ethylene glycol formulation and a concentrated propylene glycol option.
| Component | Capacity |
|---|---|
| Coolant System | 17.4 quarts |
Diesel maintenance notes for this vehicle
- Oil Level Verification: Always check the oil level after a refill to ensure accuracy.
- Filter Efficiency: Using high-quality filters like the AMSOIL EAO64-EA provides 99 percent filtering efficiency at 20 microns, which helps reduce engine wear.
- Transmission Update: Note that Dexron II or III specifications have been updated to Dexron VI per manufacturer technical service bulletins.
Common diesel oil-related concerns and how AMSOIL products may help
Maintaining a vintage diesel engine requires addressing specific lubrication challenges common to early 1980s technology.
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Engine Wear | Diesel engines face high pressure and friction. | DTTQT-EA | Delivers up to 6X more wear protection. | Requires regular oil changes. |
| Contaminants | Small particles can cause significant damage. | EAO64-EA | 99% efficiency at 20 microns. | Must be replaced per service interval. |
| Extreme Temperatures | Viscosity changes can affect lubrication. | DTTQT-EA | Excels in extreme temperatures. | Not a substitute for correct viscosity selection. |
Recall, TSB, and manufacturer communication notes
NHTSA Recall Information: A recall record exists for this vehicle model regarding the FUEL SYSTEM (GASOLINE): FUEL INJECTION SYSTEM. The summary indicates that under certain operating conditions, the governor weight retainer in the injection pump may fail, which could cause the throttle valve to stick. The remedy involves a dealer replacement of the governor weight assembly at no cost to the owner.
Note: Always verify open recalls by using your specific VIN through official manufacturer or NHTSA channels.
About this vehicle
The 1982 Pontiac Grand Prix represents a unique era in General Motors’ history, characterized by the brand’s transition in model nomenclature and exploration of diverse powertrain options. This specific variant features the 5.7L 8-cylinder engine (Engine Code N) diesel configuration.
While the Grand Prix nameplate is historically associated with luxury coupes and personal luxury vehicles, this diesel version requires specialized attention. Early 1980s diesel technology in American passenger cars differs significantly from modern standards. Owners often research specialized diesel fuel additives, high-quality filtration systems to prevent injector issues, and the integrity of the cooling system.
Because diesel technology was less common in domestic personal luxury cars during this period, maintenance context is critical. It is recommended that owners verify all technical nuances against official service manuals, particularly regarding fuel filtration and glow plug operation. This vehicle is often viewed through the lens of classic car preservation or enthusiast driving.
Common questions about this vehicle’s diesel oil and maintenance
How much oil does my 1982 Grand Prix Diesel take?
It takes 7 quarts of oil when performing a service that includes a filter change. Always verify the level after refilling.
What is the correct oil viscosity for my diesel engine?
The AMSOIL lookup suggests 10W-30 for temperatures below 16°C, 15W-40 for -18 to 16°C, and 30 weight for continuous driving above 0°C.
Can I use Dexron III in my automatic transmission?
The manufacturer’s technical service bulletin indicates that the specification has been updated from Dexron II or III to Dexron VI.
What is the oil drain plug torque for this engine?
The oil drain plug should be torqued to 20 ft/lbs.
Does AMSOIL offer a filter for my Grand Prix Diesel?
Yes, the AMSOIL Oil Filter EAO64-EA is recommended for this application.
How long does the coolant last?
Depending on the product used, such as AMSOIL Passenger Car & Light Truck Antifreeze, protection can last up to 150,000 miles or 5 years, whichever comes first.
Disclaimer: This information is derived from provided source data. Always consult your vehicle’s owner manual and official service documentation before performing maintenance.