Vehicle Performance and Fuel Efficiency Trends

This report explores key trends in vehicle performance and fuel consumption across different configurations. It examines how total miles traveled have evolved over time, the relationship between distance and fuel usage, and variations in fuel efficiency across vehicle types.

Operational Performance Over Time

Understanding the long-term patterns in vehicle operation provides context for efficiency insights. This section examines how total miles traveled have evolved across different vehicle configurations and the relationship between distance and fuel consumption.

Annual Mileage Trends by Vehicle Configuration

The annual Total Miles traveled show a similar long-term growth pattern across all vehicle Side categories, with initial performance gaps narrowing until the lines converge in the late 1980s. Although leadership among the sides frequently changed, this shared upward trend continued until peaking around the 2004 mark, after which mileage for all categories entered a period of slight decline.

Relationship Between Miles Traveled and Fuel Consumption

The relationship between Miles traveled and Gas Consumed varies significantly across the four Side categories. For the bottom and right sides, there is no consistent positive correlation, with some longer trips showing less gas consumption than shorter ones. The left and top categories exhibit even more scattered data, suggesting that distance is a particularly weak predictor of fuel usage for these configurations.

Fuel Efficiency Across Vehicle Configurations

A comparison of fuel efficiency reveals distinct performance tiers based on vehicle Side. The top and left sides exhibit the highest and nearly equivalent Average Miles Per Gallon. While the bottom side's efficiency is only slightly lower, the right side shows a more noticeable drop in performance, ranking last among the four.

Fuel Consumption Patterns

Building on the operational trends, this section delves into the specifics of fuel consumption, highlighting how median gas usage has changed over time for different vehicle configurations.

Median Gas Consumption Trends by Vehicle Configuration

Over the observed period, the Median Gas consumption for all vehicle Sides follows a broadly similar pattern, with two distinct periods of sharp increase: one peaking around 1980 and another beginning after the Year 2000. These increases were most dramatic for the left and right sides, which diverged significantly from the more moderate consumption levels of the other categories during these peaks. Notably, the data for the top category ends around the year 2000, precluding comparison during the most recent period of rising consumption.


Total miles traveled have shown a long-term growth pattern across all vehicle configurations, peaking around 2004 before a slight decline. The relationship between miles traveled and gas consumed varies significantly by vehicle type, with some configurations showing a weak correlation. Fuel efficiency also differs, with certain configurations consistently outperforming others. These insights highlight the importance of considering specific vehicle characteristics when analyzing operational performance and fuel usage.