Websites used for gas milage information: 
  

• Top 5 fuel-efficient electric cars - (https://www.kbb.com/chevrolet/bolt-ev/2019/?bodystyle=hatchback)
• Top 5 fuel-efficient Sedans - (https://www.motor1.com/features/228496/most-fuel-efficient-cars/3897059/)
• TTop 5 fuel-efficient SUV - (https://www.consumerreports.org/suvs/the-most-fuel-efficient-suvs-best-mpg/)
• TTop 5 fuel-efficient Sports Cars - (https://www.motortrend.com/news/the-20-quickest-vehicles-that-also-get-30-mpg/)

  Picture links: 

Chevy Bolt Ev - https://electrek.co/guides/chevy-bolt/

2019 Volkswagen e-golf - https://motorillustrated.com/best-electric-cars-2019-nomination-volkswagen-e-golf/14042/

 2019 Hyundai Kona Electric - https://www.google.com/search?q=2019+hyundai+kona+electric&rlz=1C5CHFA_enUS811US813&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjez-KXi6DiAhXvRt8KHf7fCQcQ_AUIDygC&biw=817&bih=516&safe=active&ssui=on#imgrc=LkM4vY9_6f5xfM:

Tesla Model 3 - https://thedriven.io/model/tesla-model-3-long-range/

Hyundai Ioniq Electric  - https://www.hyundaiusa.com/ioniq-electric/index.aspx

Jaguear XE Diesel - https://www.edmunds.com/jaguar/xe/2017/diesel/

Honda Civic - https://www.caranddriver.com/honda/civic

Toyota Corolla Hatchback - https://www.nydailynews.com/autos/latest-reviews/first-drive-2019-toyota-corolla-hatchback-review-article-1.3963342

Chevy Cruze Diesel - https://www.fuelexpress.net/blog/news/diesel-vehicles-available-2018/

Mitibushi Mirage - https://www.greencarreports.com/news/1098863_strong-selling-40-mpg-mitsubishi-mirage-to-get-sedan-model

Honda HR-V - https://www.carsguide.com.au/car-reviews/2015-honda-hr-v-review-vti-vti-s-and-vti-l-first-drive-31031

Lexus NX - https://www.kenshawlexus.com/2017/04/19/introducing-the-updated-2018-lexus-nx-nx-f-sport/

Lexus RX - https://www.lexus.com/models/RX/features

Chevy Equinox Diesel  - https://autoweek.com/article/car-reviews/2018-chevrolet-equinox-diesel-essentials-impressive-mileage-and-plenty-space

Lexus UX - https://www.lexus.com/models/UX-hybrid/packages

BMW M2 - https://www.autocar.co.uk/car-review/bmw/m2

porsche 718 cayman - https://www.caranddriver.com/porsche/718-cayman

jaguar f-type - https://www.leithcars.com/new-jaguar-f-type-raleigh.html

Porshe 911 - https://www.countrylife.co.uk/luxury/the-new-porsche-911s-car-review-86389

BMW i8 - https://www.cargurus.com/Cars/2019-BMW-i8-Pictures-c27475

Home screen picture - https://www.racefans.net/2013/09/05/2013-italian-grand-prix-build-up-in-pictures/monz-2013-3/