For the 1983 Buick LeSabre with the 5.7L 8-cylinder Diesel engine (Engine Code N), the oil capacity is 6.6 quarts with a filter change. Recommended viscosities include 10W-30 for temperatures below 16°C, 15W-40 for -18 to 16°C, and 30 weight oil for continuous driving above 0°C. AMSOIL recommends using Signature Series 10W-30 Max-Duty Diesel Oil and the EAO64-EA oil filter.
What oil does a 1983 Buick LeSabre 5.7L Diesel take?
The 1983 Buick LeSabre with the 5.7L 8-cylinder Engine Code N requires an oil grade of CF. The specific viscosity depends on your operating environment: use 10W-30 for temperatures below 16°C, 15W-40 for temperatures between -18 to 16°C, and a 30 weight oil is preferred for continuous driving when temperatures are above 0°C.
AMSOIL product recommendations
Based on the vehicle specifications, AMSOIL provides several high-performance lubrication and filtration options to maintain this diesel engine and its associated systems.
Engine Oil & Filter Kits
| Product Name | Code |
|---|---|
| Signature Series 5W-30 Max-Duty Diesel Oil | DHDQT-EA |
| Signature Series 10W-30 Max-Duty Diesel Oil | DTTQT-EA |
| Heavy-Duty 10W-30 Synthetic Diesel Oil | ADNQT-EA |
| AMSOIL Oil Filter | EAO64-EA |
Other Essential Fluids
| Component | AMSOIL Product | Code |
|---|---|---|
| Coolant | Passenger Car & Light Truck Antifreeze | ANTPC1G-EA |
| Coolant (Concentrate) | Propylene Glycol Antifreeze | ANT1G-EA |
| Automatic Transmission | Signature Series Fuel-Efficient ATF | ATLPK-EA |
| Automatic Transmission | OE Fuel-Efficient ATF | OTLQT-EA |
Engine Oil Specifications
| Specification | Details |
|---|---|
| Oil Grade | CF |
Recommended Viscosities
| Temperature Range | Viscosity |
|---|---|
| Below 16°C | 10W-30 |
| -18 to 16°C | 15W-40 |
| Above 0°C (Continuous Driving) | 30 |
Engine Oil Capacity & Torque
| Measurement | Value |
|---|---|
| Capacity (with filter) | 6.6 quarts |
| Oil Drain Plug Torque | 30 ft/lbs |
Note: Always check the oil level after refilling.
How much transmission fluid does it take?
Capacity varies significantly depending on which automatic transmission is installed in your LeSabre. The THM200-4R requires a 5-quart initial fill and an 11-quart total fill. The THM350C requires a 3-quart initial fill and a 10-quart total fill. The THM250C requires a 4-quart initial fill and a 10.8-quart total fill. Finally, the THM325-4L requires a 3.2-quart initial fill and a 10-quart total fill.
Transmission Fluid Specifications
The AMSOIL lookup note indicates that for these transmissions (THM200-4R, THM350C, THM250C, and THM325-4L), the manufacturer’s technical service bulletin has updated the specification from Dexron II or III to Dexron VI.
Engine Oil and Filter Details
Oil Filter Selection
The AMSOIL oil filter (Part Number EAO64-EA) is designed to provide 99 percent filtering efficiency at 20 microns, which helps reduce engine wear and provides greater capacity for small, wear-causing contaminants.
Air Filter & Oil Vapor Filter
No recommendations are available from the source data for the air filter or oil vapor filter for this vehicle.
Coolant Specifications
The cooling system capacity is 18 quarts. AMSOIL offers both a pre-mix and a concentrated option.
| Product | Type | Notes |
|---|---|---|
| ANTPC1G-EA | 50/50 Pre-mix | Ethylene glycol; protects metals, gaskets, and hoses. |
| ANT1G-EA | Concentrated | Requires mixing with distilled or high-quality water. |
Both products are phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free.
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. | Signature Series Diesel Oils | Delivers up to 6X more wear protection. | Requires regular oil changes. |
| Contaminant Buildup | Small particles can cause internal damage. | EAO64-EA Filter | 99% efficiency at 20 microns. | Filter must be replaced per interval. |
| Extreme Temperatures | Viscosity changes can affect lubrication. | 15W-40 or 10W-30 | Excels in extreme temperatures. | Must match temperature requirements. |
Diesel maintenance notes for this vehicle
Owners of this era’s diesel engines should prioritize the following:
- Fuel System Integrity: Ensure there are no leaks or air in the fuel lines.
- Glow Plug Functionality: Critical for reliable starting in cold weather.
- Cooling System Efficiency: Maintaining thermal management is vital for engine longevity in full-size vehicles.
Common maintenance concerns for this vehicle
Based on NHTSA consumer reports, owners have noted issues regarding Service Brakes (Hydraulic). Specifically, there was a report concerning a rotor where the casting design may contact the spindle rather than only the roller, which could potentially lead to fractures. While this is an owner report and not a verified defect, it highlights the importance of inspecting braking components during routine maintenance.
Recall, TSB, and manufacturer communication notes
Official NHTSA recall research for the 1983 Buick LeSabre returned no records. However, owners should always verify open recalls by using their specific VIN, as applicability depends on production dates and equipment levels.
About this vehicle
The 1983 Buick LeSabre represents a specific era of General Motors’ full-size sedan lineup. Historically, the LeSabre has served as Buick’s entry-level full-size offering, a position it held across multiple generations from its inception in 1959 through 2005. As a full-size vehicle, it was designed to provide a balance of comfort and utility, typically available in various body styles including sedans and station wagons.
This specific model is equipped with a 5.7L 8-cylinder diesel engine (Engine Code N). Diesel engines from this era often require distinct maintenance schedules compared to their gasoline counterparts. Owners should focus on fuel system integrity, glow plug functionality, and cooling system efficiency. Because these vehicles were designed for full-size comfort, maintaining the engine’s thermal management is critical for longevity.
Owners of this vehicle should be aware that while historical documentation provides a general context, specific technical performance data or mechanical nuances for this particular 1983 diesel variant are best verified through specialized service manuals. Maintaining proper lubrication and filtration is essential for preserving these older diesel powertrains.
Common questions about this vehicle’s diesel oil and maintenance
What is the oil capacity for my 1983 Buick LeSabre Diesel?
The capacity is 6.6 quarts when including a filter change. Always check the level after refilling.
Which AMSOIL oil is best for extreme temperatures?
AMSOIL Signature Series and Heavy-Duty synthetic diesel oils are designed to excel in extreme temperatures and maintain proper viscosity.
What torque spec should I use for the oil drain plug?
The oil drain plug should be torqued to 30 ft/lbs.
Does my transmission need Dexron VI?
Yes, the AMSOIL lookup note indicates that manufacturer technical service bulletins have updated the specification from Dexron II or III to Dexron VI for these transmissions.
How long does AMSOIL coolant last?
AMSOIL Passenger Car & Light Truck Antifreeze provides protection for up to 150,000 miles or 5 years, whichever comes first.
Can I use a different oil viscosity in winter?
The lookup recommends 10W-30 for temperatures below 16°C and 15W-40 for temperatures between -18 to 16°C.
Disclaimer: This information is derived from provided source data. Always consult your original factory service manual or a certified diesel specialist before performing mechanical work.