Based on data from 47 vehicles, 2,394 fuel-ups and 758,587 miles of driving, the 2018 Kia Optima gets a combined Avg MPG of 28.18 with a 0.40 MPG margin of error.

Any Engine Type 1.6L L4 GAS (1) 2.0L L4 ELECTRIC/GAS (7) 2.0L L4 FULL HYBRID EV-GAS (FHEV) (1) 2.0L L4 GAS (4) 2.0L L4 PLUG-IN HYBRID EV-GAS (PHEV) (3) 2.4L L4 GAS (27) DIESEL (1) L4 GAS (1) Any Body Style Sedan (22) Wagon (1) Hatchback (1) Any Submodel S (1) SX (1) Hybrid Premium (1) Hybrid LX (1) LX 1.6T (1) EX Pack (1) SXL Turbo (1) SX Turbo (3) Plug-In Hybrid EX Premium (4) Plug-In Hybrid EX (5) LX (6) EX (21) Other (1)

Below you can see a distribution of the fuel-ups with 220 outliers (8.42%) removed.

Following shows the average MPG of each of the 47 vehicles in the system.

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• Sangria

  2018 Kia Optima LX 2.4L L4 GAS Automatic 6 Speed
  Added Jul 2025 • 53 Fuel-ups

  Property of joelmcc

• 23.8 Avg MPG

• Optima

  2018 Kia Optima Plug-In Hybrid EX Premium 2.0L L4 PLUG-IN HYBRID EV-GAS (PHEV) Automatic 6 Speed Sedan
  Added Jan 2019 • 216 Fuel-ups

  Property of jzc888

• 40.7 Avg MPG

• Burt

  2018 Kia Optima LX 2.4L L4 GAS Automatic 6 Speed Sedan
  Added Oct 2019 • 173 Fuel-ups

  Property of macvanshaw

• 27.6 Avg MPG

• My Optima

  2018 Kia Optima SX Turbo 2.0L L4 GAS Automatic 6 Speed
  Added Jan 2023 • 142 Fuel-ups

  Property of Longdanp

• 26.5 Avg MPG

• Opti

  2018 Kia Optima Plug-In Hybrid EX Premium 2.0L L4 PLUG-IN HYBRID EV-GAS (PHEV) Automatic 6 Speed
  Added Apr 2025 • 5 Fuel-ups

  Property of FrozenFire

• 43.6 Avg MPG

• Kia 7S167

  2018 Kia Optima LX 2.4L L4 GAS Automatic 6 Speed
  Added Dec 2019 • 148 Fuel-ups

  Property of rdurbin

• 33.4 Avg MPG

• My Optima

  2018 Kia Optima EX 2.4L L4 GAS Automatic 6 Speed
  Added Sep 2018 • 57 Fuel-ups

  Property of lturner744

• 26.3 Avg MPG

• Stephanie

  2018 Kia Optima EX 2.4L L4 GAS Automatic 6 Speed Sedan
  Added Jul 2023 • 38 Fuel-ups

  Property of Gnylan

• 25.3 Avg MPG

• 2018 Kia Optima EX Hybrid

  2018 Kia Optima Plug-In Hybrid EX 2.0L L4 ELECTRIC/GAS Automatic 6 Speed
  Added Oct 2020 • 17 Fuel-ups

  Property of pvujanov

• 64.8 Avg MPG

• Ryne's Kia Optima Q

  2018 Kia Optima Hybrid Premium 2.0L L4 FULL HYBRID EV-GAS (FHEV) Automatic 6 Speed Sedan
  Added Apr 2023 • 64 Fuel-ups

  Property of Todaone4418

• 36.4 Avg MPG

• My Optima

  2018 Kia Optima LX 2.4L L4 GAS Automatic 6 Speed
  Added Feb 2025 • 3 Fuel-ups

  Property of jmelton328

• 32.7 Avg MPG

• Optima

  2018 Kia Optima EX 2.4L L4 GAS Automatic 6 Speed Sedan
  Added Jul 2021 • 94 Fuel-ups

  Property of dvandev827

• 29.6 Avg MPG

• 2018 Optima

  2018 Kia Optima EX 2.4L L4 GAS Automatic 6 Speed
  Added Aug 2018 • 133 Fuel-ups

  Property of kvolkert

• 23.7 Avg MPG

• Optima

  2018 Kia Optima LX 2.4L L4 GAS Automatic 6 Speed Sedan
  Added Feb 2020 • 47 Fuel-ups

  Property of crash240

• 32.5 Avg MPG

• Kia Optima

  2018 Kia Optima Plug-In Hybrid EX 2,0L L4 PLUG-IN HYBRID EV-GAS (PHEV) Automatic 6 Speed Hatchback
  Added Oct 2018 • 159 Fuel-ups

  Property of CarlGus

• 51.0 Avg MPG

• Optima 2

  2018 Kia Optima EX 2.4L L4 GAS Automatic 6 Speed Sedan
  Added May 2019 • 151 Fuel-ups

  Property of MsPymp69

• 29.0 Avg MPG

• Optima 2

  2018 Kia Optima EX 2.4L L4 GAS Automatic 6 Speed Sedan
  Added Sep 2020 • 337 Fuel-ups

  Property of t6969k

• 30.4 Avg MPG

• My Optima

  2018 Kia Optima EX 2.4L L4 GAS Automatic 6 Speed
  Added Aug 2018 • 72 Fuel-ups

  Property of pastorjeff

• 27.8 Avg MPG

• My Optima

  2018 Kia Optima Plug-In Hybrid EX Premium 2.0L L4 ELECTRIC/GAS Automatic 6 Speed
  Added Aug 2021 • 84 Fuel-ups

  Property of Rulle

• 52.7 Avg MPG

• Mia the Kia

  2018 Kia Optima EX Pack 2.4L L4 GAS Automatic 6 Speed Sedan
  Added Jul 2021 • 36 Fuel-ups

  Property of audirs4

• 32.1 Avg MPG

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