On the CarBuddii website, you can create, edit and delete your vehicles under the Garage tab.

Don't worry, deleting your vehicles in the Garage will not affect your saved mileage logs or rental contracts.

• Login to CarBuddii.com/login and enter your personal username and password.
• Click on the "Garage" tab 
• Mark the car(s) to be deleted on the left side of the list.
• Select "Actions" and press "Delete selected"

Click on the link here and go directly to the Garage: https://app.carbuddii.com/garage 

Alternative method

If you click on the relevant car and access the car information card, you can click on the three dot menu next to its name on the top of the screen and then click delete there instead.