A software update meant to track how far a car can drive on its own has turned into eight months of highway testing for one Tesla owner, and this week his streak broke past 20,000 miles without a single hands-on intervention.
David Moss, a Tacoma, Washington resident who sells LiDAR scanning equipment for a living, has been pushing his Tesla Model 3’s Full Self-Driving system further than almost anyone else on record, and the run now stands as the longest publicly tracked FSD streak the company has seen.
How the run started
Moss first caught attention in December 2025, when he logged 10,000 consecutive miles on FSD version 14.2, a run that came just days before he drove from the Tesla Diner in Los Angeles to Myrtle Beach, South Carolina, covering 2,732 miles in two days and 20 hours without a single disengagement. Tesla later called it the first verified coast-to-coast autonomous drive in company history, and the automaker featured the trip as an official customer story in March. That original streak kept building until it reached 12,961 miles across 30 states, and it ended in rural Wisconsin in January, when snow and single-digit temperatures forced Moss to take the wheel back himself.
He started over from zero, and this second attempt has gone further than the first ever did.
A cross-border push
In late May, Moss drove 3,760 miles across Canada with two companions, going from Horseshoe Bay near Vancouver to a Tesla showroom in Halifax, again without a single intervention along the way. Tesla’s vice president of AI software, Ashok Elluswamy, congratulated him publicly on X after the trip wrapped up. In June, Moss kept the same unbroken streak going and turned south, setting his sights on a run from the Canadian border down to the Mexican border, and somewhere along that stretch he crossed 10,000 miles on Tesla’s newly added in-car streak counter, becoming the first driver to reach that number since the company started showing a confetti animation for the milestone.
Every mile Moss has logged runs through the FSD Database, a community-built tracker created by Tesla influencer Omar Qazi, known on X as WholeMars, and the tool pulls telemetry straight from the car, recording any disengagement down to a tenth of a mile. That level of detail is what separates his mileage total from the kind of round numbers people often toss around on social media without proof behind them.
Tesla only added the streak feature to its software fairly recently. Version 14.2 brought a Self Driving Stats panel that compares autonomous miles against manual ones, and version 14.3.4, released in June, added the live streak counter drivers now watch climb in real time, a counter that resets the moment someone brakes, grabs the wheel, or cancels the route.
Moss has said the goal was never about chasing a number for its own sake, and instead he wanted to show, one verified mile at a time, what the software can already handle on the road today.
20,000 Mile Tesla FSD Screen Streak!
— David Moss (@DavidMoss) July 27, 2026
Special thank you to @DevinOlsenn, @scotsrule08, & @OwenSparks for helping co drive during all these fun adventures these last couple of months
Also thank you to @wholemars for always tracking me along the journey verifying it all with his… pic.twitter.com/CZ2yO6Ev0X
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