ModWash vs Sam's Xpress Car Wash
Data updated · May 24, 2026
ModWash is larger (127 vs 51 locations); ModWash is rated higher (4.85★ vs 4.43★); ModWash has the lower reviewer-reported damage rate (0.83% vs 4.44%).
ModWash is a national-tier operator and Sam's Xpress Car Wash is regional-tier, so they're competing at different scale points. ModWash edges ahead on review-weighted rating (4.85★ vs 4.43★, a meaningful gap). On reviewer-reported damage, ModWash runs lower at 0.83% vs 4.44% — a meaningful operating-quality gap. The dataset-wide average across all car wash chains is roughly 1–3%.
ModWash operates 127 locations across 12 states (10.6 sites per state on average). Sam's Xpress Car Wash operates 51 locations across 3 states (17.0 per state). Sam's Xpress Car Wash has a denser per-state footprint (17.0 sites/state vs 10.6 for ModWash), suggesting a more saturated regional strategy. Total customer signal is 182,068 Google reviews for ModWash (70,105 LLM-scored) vs 20,086 for Sam's Xpress Car Wash (2,906 scored).
How do customers rate each chain on the 7 pillars?
Aspect scores aggregate WashIndex's LLM extractions across each chain's reviews. Each score is (positive − negative) / total mentions, ranging −1 to +1. Numbers above zero mean customers say more positive than negative things about the aspect; below zero means the reverse.
| Aspect | ModWash | Sam's Xpress Car Wash | Winner |
|---|---|---|---|
| Wash Quality | +0.75 | +0.48 | ModWash |
| Staff & Customer Service | +0.94 | +0.64 | ModWash |
| Wait Time | +0.64 | +0.51 | ModWash |
| Per-Wash Price | +0.24 | +0.29 | Sam's Xpress Car Wash |
| Equipment Working | -0.33 | -0.39 | ModWash |
| Facility Cleanliness | +0.79 | +0.74 | ModWash |
| Membership Value | +0.25 | +0.23 | ModWash |
ModWash's strongest aspect in customer reviews is Staff & Customer Service (+0.94); the weakest is Equipment Working (-0.33). Sam's Xpress Car Wash's strongest is Facility Cleanliness (+0.74); the weakest is Equipment Working (-0.39). ModWash comes out ahead on Wash Quality, Staff & Customer Service, Wait Time; Sam's Xpress Car Wash doesn't have a clear win on any of the 7 pillars.
Sam's Xpress Car Wash has the lower cancellation-friction rate (9.8% vs 12.4% of mem-discussing reviews) — a meaningful gap. The dataset-wide rate is roughly 10–15%. Customers discuss memberships more often when reviewing Sam's Xpress Car Wash (13.0% of reviews) than the alternative (8.5%), which usually signals a more aggressively-marketed unlimited-wash program.
Do they operate the same format of car wash?
| Format | ModWash | Sam's Xpress Car Wash |
|---|---|---|
| Express Tunnel | 2.1% | 10.4% |
| Full Service | 3.6% | 4.3% |
| Hand Wash | 1.5% | 2.7% |
| Self-Serve Bay | 0.6% | 1.8% |
Format share is computed across customer review mentions, not over locations. A chain with mostly express-tunnel sites but heavy detail-shop talk in reviews will show both at non-trivial rates.
Both chains are predominantly Express Tunnel operators, so they compete head-on for the same customer occasion. The choice between them is largely about brand, price point, location convenience, and customer experience rather than format differentiation.
Where do ModWash and Sam's Xpress Car Wash compete?
ModWash and Sam's Xpress Car Wash compete head-to-head in 3 metropolitan statistical areas. In those shared markets, customers can choose between the two. In short: If customer-rating consistency is the deciding factor, ModWash is the safer pick; if avoiding vehicle damage is the priority, ModWash runs the lower reviewer-reported damage rate; if location convenience matters most, ModWash has more sites to choose from.
About ModWash vs Sam's Xpress Car Wash
ModWash vs Sam's Xpress Car Wash: which is bigger?
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Which has the higher customer rating, ModWash or Sam's Xpress Car Wash?
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Which has the lower damage rate, ModWash or Sam's Xpress Car Wash?
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Where do ModWash and Sam's Xpress Car Wash compete head-to-head?
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About this comparison
Both chains' numbers are pulled from the same WashIndex per-location dataset — Google reviews processed through LLM extraction across 55 dimensions, format classification from each operator's website, and competitive-density analysis. See each chain's full profile — ModWash / Sam's Xpress Car Wash — for monthly trends, per-location drill-down, executive summary, and anomaly detection.
See our full methodology for the extraction pipeline, validation samples, and aggregation logic.