AutoSpecData

Porsche Boxster Fuel Economy (MPG)

What is the real-world gas mileage of a 2020 Porsche Boxster?

The 2020 Porsche Boxster gets up to 25 MPG combined (22 city / 29 highway) in EPA testing.

Latest model year (2020):

The Porsche Boxster gets up to 24 MPG combined (21 city / 27 highway) in the Auto (AM-S7), 4 cyl, 2.0 L trim.

Verifiedfueleconomy.gov · Verified August 9, 2026
OverviewMPGEngine SpecsFuel CostTransmissionDrivetrainVehicle ClassMaintenanceDimensionsCurb Weight

Porsche Boxster MPG — All Years

YearTrimEngineFuelCity (MPG)Hwy (MPG)Combined (MPG)
2020Config 1 of 5Auto (AM-S7), 4 cyl, 2.0 L4 2.0LPremium Gasoline212724
2020Config 2 of 5Auto (AM-S7), 4 cyl, 2.0 L4 2.0LPremium Gasoline212723
2020Config 3 of 5Auto (AM-S7), 4 cyl, 2.5 L4 2.5LPremium Gasoline192522
2020Config 4 of 5Man 6-spd, 4 cyl, 2.0 L4 2.0LPremium Gasoline202622
2020Config 5 of 5Man 6-spd, 4 cyl, 2.5 L4 2.5LPremium Gasoline192421
2019Config 1 of 6Auto (AM-S7), 4 cyl, 2.0 L4 2.0LPremium Gasoline222925
2019Config 2 of 6Auto (AM-S7), 4 cyl, 2.5 L4 2.5LPremium Gasoline202622
2019Config 3 of 6Auto (AM-S7), 4 cyl, 2.5 L4 2.5LPremium Gasoline212824
2019Config 4 of 6Man 6-spd, 4 cyl, 2.0 L4 2.0LPremium Gasoline212824
2019Config 5 of 6Man 6-spd, 4 cyl, 2.5 L4 2.5LPremium Gasoline192521
2019Config 6 of 6Man 6-spd, 4 cyl, 2.5 L4 2.5LPremium Gasoline202622
2018Config 1 of 6Auto (AM-S7), 4 cyl, 2.0 L4 2.0LPremium Gasoline222925
2018Config 2 of 6Auto (AM-S7), 4 cyl, 2.5 L4 2.5LPremium Gasoline202622
2018Config 3 of 6Auto (AM-S7), 4 cyl, 2.5 L4 2.5LPremium Gasoline212824
2018Config 4 of 6Man 6-spd, 4 cyl, 2.0 L4 2.0LPremium Gasoline212824
2018Config 5 of 6Man 6-spd, 4 cyl, 2.5 L4 2.5LPremium Gasoline192521
2018Config 6 of 6Man 6-spd, 4 cyl, 2.5 L4 2.5LPremium Gasoline202622
2017Config 1 of 4Auto (AM-S7), 4 cyl, 2.0 L4 2.0LPremium Gasoline222925
2017Config 2 of 4Auto (AM-S7), 4 cyl, 2.5 L4 2.5LPremium Gasoline212824
2017Config 3 of 4Man 6-spd, 4 cyl, 2.0 L4 2.0LPremium Gasoline212824
2017Config 4 of 4Man 6-spd, 4 cyl, 2.5 L4 2.5LPremium Gasoline202622
2016Config 1 of 7Auto (AM-S7), 6 cyl, 2.7 L6 2.7LPremium Gasoline223125
2016Config 2 of 7Auto (AM-S7), 6 cyl, 3.4 L6 3.4LPremium Gasoline213025
2016Config 3 of 7Auto (AM-S7), 6 cyl, 3.4 L6 3.4LPremium Gasoline212924
2016Config 4 of 7Man 6-spd, 6 cyl, 2.7 L6 2.7LPremium Gasoline202924
2016Config 5 of 7Man 6-spd, 6 cyl, 3.4 L6 3.4LPremium Gasoline202722
2016Config 6 of 7Man 6-spd, 6 cyl, 3.4 L6 3.4LPremium Gasoline192622
2016Config 7 of 7Man 6-spd, 6 cyl, 3.8 L6 3.8LPremium Gasoline182420
2015Config 1 of 6Auto (AM-S7), 6 cyl, 2.7 L6 2.7LPremium Gasoline223125
2015Config 2 of 6Auto (AM-S7), 6 cyl, 3.4 L6 3.4LPremium Gasoline212924
2015Config 3 of 6Auto (AM-S7), 6 cyl, 3.4 L6 3.4LPremium Gasoline213025
2015Config 4 of 6Man 6-spd, 6 cyl, 2.7 L6 2.7LPremium Gasoline202924
2015Config 5 of 6Man 6-spd, 6 cyl, 3.4 L6 3.4LPremium Gasoline202722
2015Config 6 of 6Man 6-spd, 6 cyl, 3.4 L6 3.4LPremium Gasoline192622

Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.

Porsche Boxster data analysis

How Porsche Boxster combined fuel economy varies

Across 34 configurations recorded for the 2015 through 2020 Porsche Boxster, combined fuel economy runs from 20 MPG to 25 MPG. The strongest figure belongs to the 2015 Porsche Boxster (Auto (AM-S7), 6 cyl, 3.4 L) at 25 MPG, and the weakest to the 2016 car (Man 6-spd, 6 cyl, 3.8 L) at 20 MPG — a spread of 25%. A gap that wide means the model year and configuration you buy matter more than the nameplate does: quoting a single number for the Porsche Boxster would be misleading.

What changed for 2020

Average combined fuel economy for the 2020 Porsche Boxster is 22.4 MPG, against 23 MPG for the 2019 car — it fell by 0.6 MPG. Buyers who care most about this figure should look at the earlier model years in the table above before assuming newest is best.

How to read this Porsche Boxster data

This page lists every 2015 through 2020 Porsche Boxster record we hold for this measurement — 34 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Configurations behind these Porsche Boxster numbers

The 2015 through 2020 Porsche Boxster entries here cover variants including Auto (AM-S7), 4 cyl, 2.0 L, Auto (AM-S7), 4 cyl, 2.5 L, Man 6-spd, 4 cyl, 2.0 L, Man 6-spd, 4 cyl, 2.5 L, Auto (AM-S7), 6 cyl, 2.7 L, Auto (AM-S7), 6 cyl, 3.4 L, Man 6-spd, 6 cyl, 2.7 L and Man 6-spd, 6 cyl, 3.4 L. 2016 is the busiest model year in the record with 7 separate measured configurations, which is why a single quoted combined fuel economy figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.

Where these Porsche Boxster figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Porsche Boxster record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Official Factory Specs vs. AutoSpecData Expert Benchmarks

The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.

Cruise speedEPA highway specAutoSpecData adjusted MPGFuel you lose
60 mph31 MPG31 MPG0%
65 mph31 MPG28.9 MPG7%
70 mph31 MPG26.9 MPG13%
75 mph31 MPG25.1 MPG19%
80 mph31 MPG23.4 MPG25%

Our Real-World Speed MPG Adjuster re-scales the Porsche Boxster EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.

Frequently Asked Questions About Boxster MPG

What is the MPG of the Porsche Boxster?

The Porsche Boxster gets up to 25 MPG combined (22 city / 29 highway) in the 2020 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Porsche Boxster trim has the best fuel economy?

The Auto (AM-S7), 4 cyl, 2.0 L trim offers the best combined fuel economy at 25 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.

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