Based on data from 27 vehicles, 1,403 fuel-ups and 319,992 miles of driving, the 1999 Porsche 911 gets a combined Avg MPG of 18.88 with a 0.23 MPG margin of error.

Any Engine Type 3.4L H6 GAS (23) H6 GAS (1) L6 GAS (1) Any Body Style Coupe (6) Any Submodel Carrera 4 (6) Carrera (18) Other (3)

Below you can see a distribution of the fuel-ups with 31 outliers (2.16%) removed.

Following shows the average MPG of each of the 27 vehicles in the system.

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• My 911

  1999 Porsche 911 Carrera 4 3.4L H6 GAS Automatic 5 Speed
  Added Apr 2019 • 144 Fuel-ups

  Property of sregener

• 19.2 Avg MPG

• My 911

  1999 Porsche 911 Carrera 4 3.4L H6 GAS Manual 6 Speed
  Added Apr 2019 • 18 Fuel-ups

  Property of LRSA

• 17.7 Avg MPG

• Carrera

  1999 Porsche 911 Carrera 3.4L H6 GAS Automatic 5 Speed
  Added Sep 2016 • 52 Fuel-ups

  Property of bill944

• 20.2 Avg MPG

• 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Jul 2019 • 57 Fuel-ups

  Property of DouglasVee

• 22.0 Avg MPG

• Überbug

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed
  Added Sep 2015 • 37 Fuel-ups

  Property of ohlins8990

• 19.1 Avg MPG

• Caroline

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed Coupe
  Added Aug 2016 • 42 Fuel-ups

  Property of TDImiser

• 17.5 Avg MPG

• 996

  1999 Porsche 911 Carrera 4 3.4L H6 GAS Manual 6 Speed
  Added Aug 2020 • 187 Fuel-ups

  Property of rock996

• 14.6 Avg MPG

• Porsche 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed
  Added Nov 2016 • 65 Fuel-ups

  Property of texasrph

• 20.6 Avg MPG

• Porsche 996

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed Coupe
  Added Apr 2018 • 163 Fuel-ups

  Property of mumeh

• 17.7 Avg MPG

• Porsche

  1999 Porsche 911 Carrera 4 3,4L H6 GAS Standard 6 Speed
  Added May 2018 • 46 Fuel-ups

  Property of maggioli

• 18.7 Avg MPG

• 996

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed Coupe
  Added Feb 2015 • 79 Fuel-ups

  Property of FlatPower

• 21.8 Avg MPG

• My 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Automatic 5 Speed
  Added Nov 2019 • 6 Fuel-ups

  Property of Jordanelliott

• 17.2 Avg MPG

• Porsche

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed
  Added Aug 2016 • 12 Fuel-ups

  Property of mikejwininger

• 17.4 Avg MPG

• X1999 996 Carrera

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Mar 2015 • 137 Fuel-ups

  Property of MJCGT3

• 18.3 Avg MPG

• Porsche 996

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed
  Added Sep 2016 • 44 Fuel-ups

  Property of RobMac

• 16.8 Avg MPG

• 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Jul 2019 • 7 Fuel-ups

  Property of wrxsti87

• 21.3 Avg MPG

• 1. c2c

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed
  Added Mar 2017 • 28 Fuel-ups

  Property of lbkNhubert

• 21.8 Avg MPG

• 1999 Porsche 911 C2

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed Coupe
  Added May 2018 • 28 Fuel-ups

  Property of enigma

• 22.0 Avg MPG

• My 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Nov 2018 • 28 Fuel-ups

  Property of dominicmannphoto

• 19.4 Avg MPG

• My 911

  1999 Porsche 911 Carrera 4 3.4L H6 GAS Manual 6 Speed
  Added Apr 2019 • 4 Fuel-ups

  Property of subiechic

• 18.3 Avg MPG

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