The 1974 Plymouth Duster typically achieves an average of 10.39 miles per gallon (MPG). This figure represents a combined average based on extensive real-world driving data.
Detailed Fuel Economy Overview
This average fuel economy is derived from a substantial dataset, encompassing 507 recorded fuel-ups across three distinct 1974 Plymouth Duster vehicles. These vehicles collectively accumulated over 52,363 miles of driving, providing a robust foundation for this average. It's important to note a margin of error of 0.23 MPG, indicating slight variability in individual vehicle performance or measurement.
The following table summarizes the key statistics for the 1974 Plymouth Duster's fuel consumption:
| Metric | Value | Notes |
|---|---|---|
| Average MPG | 10.39 MPG | Combined city and highway average |
| Margin of Error | ± 0.23 MPG | Reflects data variability and precision |
| Vehicles Tracked | 3 | Number of unique Dusters in the dataset |
| Total Fuel-ups | 507 | Comprehensive fill-up records |
| Total Miles Driven | 52,363 miles | Extensive real-world usage for analysis |
Factors Influencing Fuel Economy of a Classic Car
The actual miles per gallon a 1974 Plymouth Duster achieves can vary based on several factors, common to many classic vehicles:
- Engine and Transmission Configuration: The 1974 Duster was offered with various engine options, including the economical Slant-6 and more powerful V8s (e.g., 318 cubic inch). The specific engine paired with the transmission type (manual or automatic) significantly impacts fuel consumption. Generally, larger engines and older automatic transmissions tend to be less fuel-efficient.
- Vehicle Maintenance: Proper and consistent maintenance is crucial for optimal fuel economy. This includes regularly checking spark plugs, air filters, carburetor tuning, ignition timing, and ensuring correct tire pressure. Neglecting these areas can lead to a noticeable drop in MPG.
- Driving Habits: Aggressive driving, characterized by rapid acceleration and hard braking, consumes more fuel than smooth, consistent driving. Frequent short trips and heavy city traffic with stop-and-go driving also contribute to lower MPG compared to steady highway cruising.
- Overall Vehicle Condition: The car's weight, aerodynamic modifications (if any), and the condition of its drivetrain components can all play a role in its fuel efficiency. For example, worn bearings or brakes could slightly increase drag and reduce MPG.
- Fuel Quality: While modern Dusters might be rare, using the appropriate fuel grade specified for the engine can ensure optimal combustion and efficiency.
Historical Context
The 1974 Plymouth Duster was a popular compact car known for its sporty styling and versatility. Fuel efficiency was not a primary design focus during this era compared to modern vehicles, especially with the onset of the 1973 oil crisis reshaping the automotive landscape. Consequently, classic vehicles from this period typically have lower MPG figures than contemporary cars, which benefit from decades of technological advancements in engine design, aerodynamics, and lightweight materials. For deeper insights into classic car specifications and performance, you can often find valuable resources from automotive history archives and classic car enthusiast communities.
