Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1984 Conquest.
The 1984 Plymouth Conquest is EPA-rated at 17/23/19 mpg city/highway/combined.
Fluid capacities, tune-up values and fuel economy at a glance.
Engine, drivetrain, dimensions and economy.
| Transmission | Automatic 4-spd |
| EPA city / highway / combined | 17 / 23 / 19 mpg |
| Recommended fuel | Regular Gasoline |
Capacities, torques and tune-up values from the factory service manual.
This engine GL-5 · 80W-90 · 85W-90 in the differential, DOT 3 brake fluid.
| Brake Fluid | DOT 3 |
| Differential Gear Oil | GL-5 · 80W-90 · 85W-90 |
| Differential Gear Oil Capacity | 2.5 Pints |
| Engine Coolant | ETHYLENE GLYCOL |
| Power Steering Fluid | USE MOPAR PART NO. 4318055 OR EQUIVALENT |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Cross-vehicle references for the kinds of data on this page.
EPA figures are 17 city / 23 highway / 19 combined mpg.