Every dealer website we monitor, ranked by website provider and by car brand on how fast it is for real shoppers: Google's Core Web Vitals, from Chrome's own data. The rankings update nightly as dealers are added and sites change.
How the rankings work
Google's Core Web Vitals: how long the main content takes to appear (Largest Contentful Paint), how quickly the page responds to a tap or click (Interaction to Next Paint), and how much the page jumps around while it loads (Cumulative Layout Shift). Google uses the same three measures when it evaluates page experience.
Real visits. The scores use Chrome's own field data: what three out of four actual shoppers experienced, on phones and on desktop. A site without enough Chrome traffic for Google to publish field data is placed on our daily lab test instead.
Every dealer website gets a DD1 site score from 0 to 100, the same score dealers see in our free speed test. A provider's place is the median score of its sites, so one unusual site can't move it. A provider needs at least 50 measured sites to be ranked; smaller providers are counted in the totals.
A site passes when all three measures are in Google's good range for three out of four visits: main content within 2.5 seconds, a response to a tap within 200 milliseconds, and a layout shift of 0.1 or less. The pass rate is the share of a provider's sites with Chrome data that do.
Every dealer website Dealer Data One monitors, franchise and independent, tested on mobile and desktop every day. Each site counts toward the provider whose platform we detect on it and toward its brand; a store selling several brands counts under its lead brand.
Nightly. When a dealer is added, a site switches providers or a provider reaches 50 sites, the rankings show it the next morning. No dealership is named; the rankings cover providers and brands only.
Common questions
It changes as sites are measured, which is why the rankings above are live. Rank by DD1 site score for the overall order, or by mobile pass rate for Google's own pass or fail test.
Google's good thresholds: Largest Contentful Paint within 2.5 seconds, Interaction to Next Paint within 200 milliseconds, and Cumulative Layout Shift of 0.1 or less, each for at least three out of four visits. Many dealer websites miss at least one on mobile, most often responsiveness or layout shift.
Google uses Core Web Vitals as part of how it evaluates page experience. Speed rarely outranks relevance, but a slow page loses shoppers before they see a single vehicle.
Partly. The provider sets the template, but stores add a lot on top: chat widgets, trade-in tools, tracking tags and large photos. Our free website speed test shows what is slowing down a specific site.
Lighthouse is one simulated load on a throttled phone. These rankings use Chrome's measurements of real visits, which is what Google ranks on. The two often disagree, and the real-visit numbers are the ones shoppers feel.
We detect the platform from the site itself: the provider's code, the hosts it loads files from and its footer credit. When a dealer switches providers, the site moves to the new provider's numbers from the next measurement.
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