Based on data from 37 vehicles, 1,778 fuel-ups and 405,379 miles of driving, the 1999 Porsche 911 gets a combined Avg MPG of 18.89 with a 0.20 MPG margin of error.

Any Engine Type 3.4L H6 GAS (33) H6 GAS (1) L6 GAS (1) Any Body Style Coupe (10) Any Submodel Carrera 4 (6) Carrera (28) Other (3)

Below you can see a distribution of the fuel-ups with 54 outliers (2.95%) removed.

Following shows the average MPG of each of the 37 vehicles in the system.

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• 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Jul 2019 • 79 Fuel-ups

  Property of DouglasVee

• 21.9 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

  1999 Porsche 911 Carrera 4 3,4L H6 GAS Standard 6 Speed
  Added May 2018 • 73 Fuel-ups

  Property of maggioli

• 18.6 Avg MPG

• Carrera

  1999 Porsche 911 Carrera 3.4L H6 GAS Automatic 5 Speed
  Added Sep 2016 • 57 Fuel-ups

  Property of bill944

• 20.2 Avg MPG

• Porsche 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed
  Added Nov 2016 • 67 Fuel-ups

  Property of texasrph

• 20.5 Avg MPG

• My 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Aug 2021 • 59 Fuel-ups

  Property of Tippey764

• 19.4 Avg MPG

• My 911

  1999 Porsche 911 Carrera 4 3.4L H6 GAS Automatic 5 Speed
  Added Apr 2019 • 202 Fuel-ups

  Property of sregener

• 19.6 Avg MPG

• Porsche

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Aug 2016 • 22 Fuel-ups

  Property of mikejwininger

• 16.8 Avg MPG

• Porsche 996

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed Coupe
  Added Apr 2018 • 169 Fuel-ups

  Property of mumeh

• 17.6 Avg MPG

• My 911

  1999 Porsche 911 Carrera 4 3.4L H6 GAS Manual 6 Speed
  Added Apr 2019 • 30 Fuel-ups

  Property of LRSA

• 18.0 Avg MPG

• My 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Automatic 5 Speed
  Added Apr 2021 • 14 Fuel-ups

  Property of billtdi

• 16.9 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

• Caroline

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed Coupe
  Added Aug 2016 • 44 Fuel-ups

  Property of TDImiser

• 17.4 Avg MPG

• My 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added May 2021 • 16 Fuel-ups

  Property of LamonZak

• 19.7 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

• 1. c2c

  1999 Porsche 911 Carrera 3.4L H6 GAS Standard 6 Speed
  Added Mar 2017 • 29 Fuel-ups

  Property of lbkNhubert

• 21.6 Avg MPG

• 996 Carrera

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added Dec 2021 • 4 Fuel-ups

  Property of legalhexadecimal

• 20.9 Avg MPG

• 996

  1999 Porsche 911 Carrera 4 3.4L H6 GAS Manual 6 Speed
  Added Aug 2020 • 192 Fuel-ups

  Property of rock996

• 14.7 Avg MPG

• 996 C2

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed Coupe
  Added Sep 2021 • 5 Fuel-ups

  Property of garyh12

• 21.4 Avg MPG

• My 911

  1999 Porsche 911 Carrera 3.4L H6 GAS Manual 6 Speed
  Added May 2021 • 19 Fuel-ups

  Property of edvaizey

• 18.8 Avg MPG

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