We just added the ability to hide cars reporting 0.0 MPG because they don't have fuel-ups yet.
While you're browsing cars, look for the "hide zero mpg" link at the top of the page.
Click it, and you'll get a list of just those cars that are reporting mileage. You can click "show all" to go back to the default listing. We're planning to add this to motorcycle browsing too once there are more motorcycles reporting mileage.
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