2020 Mazda 3 5-Door 4WD: MPG and fuel economy

This page collects every fuel-economy figure the EPA publishes for the 2020 Mazda 3 5-Door 4WD. Below you will find the headline combined, city, and highway MPG, the estimated annual fuel cost at three different driving levels, the tailpipe CO₂ emissions, and a full breakdown of the engine and drivetrain. If you want to know whether this generation got more or less efficient over the years, the year-over-year table further down covers every model year the EPA has rated.

Fuel economy at a glance

These are the EPA's official ratings for the 2020 Mazda 3 5-Door 4WD. The numbers come from a standardised laboratory test cycle and are the same figures that appear on the window sticker of every new car. Real-world mileage varies with driving style, weather, fuel quality, and how heavily loaded the car is.

Combined MPG is a 55/45 weighted blend of the city and highway test cycles. The EPA uses it as the single number you can compare across the entire dataset, including hybrids and EVs (which use the equivalent MPGe figure).

How the 2020 Mazda 3 5-Door 4WD compares

The 2020 Mazda 3 5-Door 4WD returns 27 combined MPG. Cars in the Midsize Cars class for the same model year average 36 MPG, which puts this car behind the class average by about 25%.

The most efficient car in the Midsize Cars class for the 2020 model year is the Tesla Model 3 Standard Range Plus at 141 MPG. The bar chart below puts the Mazda 3 5-Door 4WD alongside the class best and the class average so you can see the full picture.

For broader context, the average new car of the 2020 model year (across all classes) returns 27.2 MPG. Larger vehicles pull the all-cars average down, so do not use that figure on its own to judge a small car or a hybrid. The full list of the most efficient cars of the 2020 model year is on its own page.

Annual fuel cost across driving patterns

The headline annual fuel cost the EPA publishes assumes 15,000 miles of driving per year and a fuel mix of 55% city and 45% highway. The dollar figure is calculated using the EPA's current reference price for regular gasoline, which is $3.99/gallon. EPA updates that reference periodically rather than tracking live pump prices, so treat it as a window-sticker estimate rather than today's pump number.

The table below scales the EPA's number to three common driving patterns. The combined MPG and the reference fuel price stay constant, only the annual mileage changes. To get a current-prices estimate, take your local gas price and multiply by 555.6 gallons (the car's annual consumption at the rated MPG).

Year-over-year MPG for the Mazda 3 5-Door 4WD

The EPA has rated the Mazda 3 5-Door 4WD across 8 model years, from 2019 Mazda 3 5-Door 4WD through 2026 Mazda 3 5-Door 4WD. The numbers below are the best combined MPG figure the EPA published for each year, which lets you see when the car was at its most efficient and how recent generations stack up.

Combined MPG has stayed in roughly the same range across the run. The peak rating came with the 2023 Mazda 3 5-Door 4WD at 29 MPG.

Compare against other Midsize Cars for 2020

If you are cross-shopping the 2020 Mazda 3 5-Door 4WD, the most useful comparison is against the other cars in the Midsize Cars class for the same model year. The list below shows the highest-MPG peers, ranked from most to least efficient. Click any of them to open its full page.

The Tesla Model 3 Standard Range Plus leads this group at 141 MPG, 114 MPG ahead of the 2020 Mazda 3 5-Door 4WD.

Specifications

The 2020 Mazda 3 5-Door 4WD runs a 2.5-liter 4-cylinder engine paired with a automatic (s6), sending power through 4-wheel drive.

Engine, transmission, and drivetrain together drive most of the variation in fuel economy across trims. A larger engine moves the car with less effort but burns more fuel. A turbo lets a small engine punch above its weight, often without much MPG penalty. All-wheel drive adds traction and weight, and usually costs a couple of MPG compared with two-wheel drive of the same engine.

Vehicle class

Midsize Cars

Engine

2.5L 4-cylinder

Transmission

Automatic (S6)

Drivetrain

4-Wheel Drive

Fuel type

Regular

Annual petroleum use

11 barrels per year

Common questions about the 2020 Mazda 3 5-Door 4WD

Quick answers to the questions people most often search for when looking up the 2020 Mazda 3 5-Door 4WD.

• Is the 2020 Mazda 3 5-Door 4WD fuel efficient?

  Not particularly. The 2020 Mazda 3 5-Door 4WD returns 27 combined MPG, which trails the average car in the Midsize Cars class for the same model year by about 25%.
• What MPG does the 2020 Mazda 3 5-Door 4WD get?

  The EPA rates the 2020 Mazda 3 5-Door 4WD at 27 combined MPG, 24 MPG in city driving, and 32 MPG on the highway. Real-world numbers depend on your driving style, the weather, and how loaded the car is.
• How much does it cost to fuel a 2020 Mazda 3 5-Door 4WD per year?

  The EPA estimates an annual fuel cost of $2,200 for the 2020 Mazda 3 5-Door 4WD. That figure assumes 15,000 miles of driving per year, a 55% city and 45% highway split, and the EPA's published average fuel price for the rated fuel grade.
• What fuel does the 2020 Mazda 3 5-Door 4WD use?

  The EPA lists the 2020 Mazda 3 5-Door 4WD as running on regular gasoline. Using a different grade than the manufacturer specifies can affect fuel economy and engine longevity.
• Has the Mazda 3 5-Door 4WD become more fuel efficient over time?

  Combined MPG has stayed close to flat across the run. Both the earliest (2019 Mazda 3 5-Door 4WD, 27 MPG) and most recent (2026 Mazda 3 5-Door 4WD, 28 MPG) versions sit in the same range.
• How much CO₂ does the 2020 Mazda 3 5-Door 4WD emit?

  Tailpipe CO₂ emissions are 328 g/mi. Multiplied across a typical year of driving (15,000 miles) that works out to about 4,920 kilograms of CO₂.
• What is the difference between the city and highway MPG of the 2020 Mazda 3 5-Door 4WD?

  City driving returns 24 MPG and highway driving returns 32 MPG, a gap of 8 MPG. A spread that wide is typical of cars with conventional automatic or manual transmissions, where stop-start city traffic eats more fuel than a steady highway cruise.
• What engine is in the 2020 Mazda 3 5-Door 4WD?

  The 2020 Mazda 3 5-Door 4WD has a 2.5-liter 4-cylinder engine (EPA description: SIDI).
• What transmission and drivetrain does the 2020 Mazda 3 5-Door 4WD have?

  The 2020 Mazda 3 5-Door 4WD comes with a automatic (s6) transmission and 4-wheel drive.
• How does the 2020 Mazda 3 5-Door 4WD compare to the best car in its class?

  The most efficient car in the Midsize Cars class for the 2020 model year is the Tesla Model 3 Standard Range Plus at 141 combined MPG. The Mazda 3 5-Door 4WD returns 27 MPG, a gap of 114 MPG. If you are comparing on fuel economy alone, the class leader is worth a look.

Source: U.S. EPA fuel economy dataset. Annual fuel cost figures assume 15,000 miles of driving per year and a 55% city, 45% highway split. Real-world mileage varies with driving conditions, vehicle maintenance, fuel quality, and driver behaviour.