Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1984 Conquest.
The 1984 Dodge Conquest is defined by a four-speed automatic transmission, EPA ratings of 17/23/19 mpg, and a service regimen calling for 4.0 quarts of oil in viscosities spanning 20W-20, 15W-40, and 5W-30. Its reliability ledger shows zero recalls and a single owner complaint categorized under Fuel System, Gasoline. That minimal paper trail places the 1984 model at the cleanest end of the Conquest’s documented reliability history, meaning researchers encounter a year with virtually no factory actions or recurring owner-reported defects to untangle.
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 holds 4.0 qt of 20W-20 / 15W-40 / 5W-30 engine oil, 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 |
| Engine Oil | 20W-20 · 15W-40 · 5W-30 · 5W-40 |
| Engine Oil Capacity | 4.0 qt |
| Power Steering Fluid | USE MOPAR PART NO. 4318055 OR EQUIVALENT |
Condensed service procedures for routine maintenance. Procedures that require dealer diagnostic equipment are identified and summarized only.
| Tool required | DRBIII scan tool (dealer / locksmith) |
| Why | Transmitter codes are written into the receiver in the passenger door module |
| When needed | After Sentry Key Immobilizer Module (SKIM) replacement |
| Tool required | DRBIII scan tool |
| Also required | The vehicle's four-digit PIN code |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Owner complaints about the 1984 Dodge Conquest dominate in one area — the fuel system, gasoline, 1 of 1 reports (100%), well ahead of the next concern. NHTSA has issued no recalls for this vehicle, so these are owner-reported concerns only. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the fuel system, gasoline pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.
All 1 complaints on record, top 1 components.
Source: NHTSA Office of Defects Investigation complaint database.
No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.
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.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
4.0 qt of ABOVE 20 degrees F: 30, 20 degrees F TO 80 degrees F: 20W-20, ABOVE 10 degrees F: 15W-40, BELOW 100 degrees F 5W-30 OR 5W-40, BELOW 60 degrees F: 5W-30, 5W-40, per the factory manual.
NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.
EPA figures are 17 city / 23 highway / 19 combined mpg.