Based on data from 39 vehicles, 1,937 fuel-ups and 442,987 miles of driving, the 1999 Porsche 911 gets a combined Avg MPG of 18.91 with a 0.19 MPG margin of error.

Any Engine Type 3.4L H6 GAS (35) H6 GAS (1) L6 GAS (1) Any Body Style Coupe (10) Any Submodel Carrera 4 (6) Carrera (30) Other (3)

Below you can see a distribution of the fuel-ups with 57 outliers (2.86%) removed.

Following shows the average MPG of each of the 39 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 • 279 Fuel-ups

  Property of sregener

• 19.6 Avg MPG

• 996

  1999 Porsche 911 Carrera 4 3.4L H6 GAS Manual 6 Speed
  Added Aug 2020 • 205 Fuel-ups

  Property of rock996

• 15.1 Avg MPG

• My 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added May 2021 • 25 Fuel-ups

  Property of LamonZak

• 19.1 Avg MPG

• 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added May 2023 • 9 Fuel-ups

  Property of jcrogesr87

• 22.2 Avg MPG

• 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Jul 2019 • 83 Fuel-ups

  Property of DouglasVee

• 21.9 Avg MPG

• Porsche

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Aug 2016 • 28 Fuel-ups

  Property of mikejwininger

• 16.6 Avg MPG

• Cara

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Dec 2022 • 28 Fuel-ups

  Property of Krulm

• 22.0 Avg MPG

• Porsche 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed
  Added Nov 2016 • 68 Fuel-ups

  Property of texasrph

• 20.5 Avg MPG

• My 911

  1999 Porsche 911 Carrera 4 3.4L H6 GAS Manual 6 Speed
  Added Apr 2019 • 40 Fuel-ups

  Property of LRSA

• 18.3 Avg MPG

• Caroline

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed Coupe
  Added Aug 2016 • 46 Fuel-ups

  Property of TDImiser

• 17.3 Avg MPG

• My 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Automatic 5 Speed
  Added Apr 2021 • 19 Fuel-ups

  Property of billtdi

• 17.3 Avg MPG

• 996 C2

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed Coupe
  Added Mar 2022 • 5 Fuel-ups

  Property of garyh164

• 21.4 Avg MPG

• Porsche 996

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed Coupe
  Added Apr 2018 • 173 Fuel-ups

  Property of mumeh

• 17.6 Avg MPG

• Porsche

  1999 Porsche 911 Carrera 4 3,4L H6 GAS Standard 6 Speed
  Added May 2018 • 77 Fuel-ups

  Property of maggioli

• 18.8 Avg MPG

• X1999 996 Carrera

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Mar 2015 • 141 Fuel-ups

  Property of MJCGT3

• 18.2 Avg MPG

• My 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Aug 2021 • 76 Fuel-ups

  Property of Tippey764

• 18.7 Avg MPG

• 1. c2c

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed
  Added Mar 2017 • 30 Fuel-ups

  Property of lbkNhubert

• 21.4 Avg MPG

• Carrera

  1999 Porsche 911 Carrera 3.4L H6 GAS Automatic 5 Speed
  Added Sep 2016 • 58 Fuel-ups

  Property of bill944

• 20.0 Avg MPG

• Penny

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed Coupe
  Added Dec 2021 • 3 Fuel-ups

  Property of rvariverguy

• 20.0 Avg MPG

• Porsche 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed Coupe
  Added Mar 2021 • 8 Fuel-ups

  Property of pinkhamr

• 18.0 Avg MPG

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