The Science of
Inventory Turn.
Modern automotive advertising is a game of speed and data. When live inventory feeds drive your ads and every piece of creative is OEM-compliant, dealerships shorten days-to-turn, cut floorplan cost, and claim the co-op dollars they’ve earned.
Why is the shotgun approach to automotive advertising dead?
Today’s car buyer shows up informed. They’ve researched models, compared prices, and narrowed their choices before they ever set foot on the lot. Static monthly campaigns that push the same generic message to everyone waste budget on people who aren’t in the market. Winning dealerships move from campaigns to inventory-focused acquisition.
In automotive marketing, Tier 1 is the manufacturer’s national advertising, Tier 2 is the regional dealer association, and Tier 3 is the individual dealership: the level where a store’s own budget, inventory, and reputation are on the line. Tier 3 is where precision pays. At RadioVision, we don’t just run ads; we manage Inventory Velocity Systems.
What does an aging unit really cost?
Every day a vehicle sits, it accrues floorplan interest, and used vehicles lose market value on top of that. The cost is easy to ignore one unit at a time and impossible to ignore across a whole lot. That’s why inventory turn, not impressions, is the scoreboard.
| Days on lot | At 7% floorplan | At 9% floorplan |
|---|---|---|
| 30 days | $259 | $333 |
| 60 days | $518 | $666 |
| 90 days | $777 | $999 |
| 120 days | $1,036 | $1,332 |
Simple interest: price × rate × days ÷ 365. The 7–9% range matches the floorplan rates in our 2026 Perfect Storm report. Depreciation, reconditioning, and lot costs come on top.
What is inventory-feed advertising?
Inventory-feed advertising connects your live inventory to your ads. Platforms such as Google’s vehicle ads and Meta’s catalog ads for automotive build ads from a vehicle feed, so the units, prices, and photos shoppers see match what’s actually on your lot. When a unit sells, it drops out of rotation with the next feed update; when new units arrive, they go live automatically.
The RadioVision Brain Lab uses live inventory feed advertising to fuel dynamic campaigns across search, social, and streaming. Instead of promoting a model you sold last Tuesday, your budget follows the cars you need to sell, with extra weight on aging units before they hit your aging limit. A feed-driven setup includes:
- A clean, complete vehicle feed: VIN, price, photos, mileage, and trim.
- Campaigns segmented by new, used, and certified pre-owned.
- Budget rules that push spend toward aging units.
- Creative that refreshes automatically as inventory changes.
How does OEM compliance protect co-op dollars?
Co-op programs reimburse part of a dealer’s advertising spend, but only when the creative follows brand guidelines and the claim includes proper proof of performance. Non-compliant creative or missing documentation means reimbursement you’ve earned goes unclaimed.
Fragmented agencies often struggle with complex, shifting OEM requirements. RadioVision’s work with dealer groups such as AutoNation and Asbury Automotive has built an institutional memory of compliance standards. We deliver proof-of-performance documentation, so you can claim every co-op dollar you’ve earned. Learn more about co-op and tiered advertising.
How does AI video help dealers sell more cars?
In automotive, video is the currency of conversion. Our AI Studio produces personalized, unit-specific video spots at a fraction of the cost of traditional production, so a dealership can match creative to its inventory and offers at the speed of modern retail.
We take the high-end production DNA of our founders and apply it at scale: the polish of a professionally produced spot, delivered fast enough to keep up with your lot. Pair it with dealership CTV and OTT and dealership PPC to reach in-market shoppers wherever they watch and search.
What’s the one metric that matters?
Inventory turn. Every channel, every creative decision, and every dollar should be judged by how fast it helps units leave the lot at a healthy gross. From Tier 3 precision targeting to Seamless Continuity in your branding, RadioVision is the engine that drives showroom visits.
The velocity checklist
- Track days’ supply and aging by model every week.
- Feed live inventory into search and social ads.
- Shift spend toward aging units before they reach your aging limit.
- Keep every piece of creative OEM-compliant, and file co-op claims with complete proof of performance.
- Measure showroom visits and sold units, not just clicks.
See how we put it all together in our automotive advertising guide.
Frequently Asked Questions
What is inventory turn?
Inventory turn measures how quickly a dealership sells and replaces its inventory. Dealers often track it as days’ supply (units in stock divided by average daily sales) or as the average number of days a unit sits before it sells.
How does advertising affect days-to-turn?
Advertising tied to live inventory puts the right units in front of in-market shoppers while they’re deciding. Shifting spend toward aging units helps sell them before floorplan interest and depreciation erode their gross.
What is Tier 3 automotive advertising?
Tier 3 is advertising paid for and run by an individual dealership, as opposed to Tier 1 (the manufacturer’s national advertising) and Tier 2 (regional dealer associations). It’s where a store competes for its own market.
Do co-op programs require OEM-compliant ads?
Generally, yes. Manufacturer co-op programs typically reimburse only advertising that follows brand guidelines and is submitted with proof of performance. Rules vary by brand and change often, so review each program’s current guidelines.
Ready to Sell Cars Faster?
Let’s look at your inventory, your market, and your co-op, and build a plan that gets units off the lot faster. Strategy, creative, and media, all under one roof.
Schedule a Consultation Or call (903) 337-4200