ModWash vs Tidal Wave Auto Spa | Car Wash
Data updated · May 24, 2026
Tidal Wave Auto Spa | Car Wash is larger (317 vs 127 locations); ModWash is rated higher (4.85★ vs 4.56★); ModWash has the lower reviewer-reported damage rate (0.83% vs 2.22%).
ModWash and Tidal Wave Auto Spa | Car Wash are both national-tier US car wash operators. ModWash edges ahead on review-weighted rating (4.85★ vs 4.56★, a modest gap). On reviewer-reported damage, ModWash runs lower at 0.83% vs 2.22% — a modest operating-quality gap. The dataset-wide average across all car wash chains is roughly 1–3%.
| Metric | ModWash modwash.com | Tidal Wave Auto Spa | Car Wash tidalwaveautospa.com |
|---|---|---|
| Locations | 127 12 states | 317 32 states |
| Reviews | 182,068 70,105 LLM-scored | 139,247 65,301 LLM-scored |
| Avg rating | 4.85 | 4.56 |
| Damage rate (lower better) | 0.83% | 2.22% |
| Membership cancellation friction (of mem-discussing reviews) | 12.4% | 19.5% |
| Dominant format | Express Tunnel | Express Tunnel |
ModWash operates 127 locations across 12 states (10.6 sites per state on average). Tidal Wave Auto Spa | Car Wash operates 317 locations across 32 states (9.9 per state). Total customer signal is 182,068 Google reviews for ModWash (70,105 LLM-scored) vs 139,247 for Tidal Wave Auto Spa | Car Wash (65,301 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 | Tidal Wave Auto Spa | Car Wash | Winner |
|---|---|---|---|
| Wash Quality | +0.75 | +0.70 | ModWash |
| Staff & Customer Service | +0.94 | +0.83 | ModWash |
| Wait Time | +0.64 | +0.44 | ModWash |
| Per-Wash Price | +0.24 | -0.13 | ModWash |
| Equipment Working | -0.33 | -0.26 | Tidal Wave Auto Spa | Car Wash |
| Facility Cleanliness | +0.79 | +0.78 | ModWash |
| Membership Value | +0.25 | -0.05 | ModWash |
ModWash's strongest aspect in customer reviews is Staff & Customer Service (+0.94); the weakest is Equipment Working (-0.33). Tidal Wave Auto Spa | Car Wash's strongest is Staff & Customer Service (+0.83); the weakest is Equipment Working (-0.26). ModWash comes out ahead on Staff & Customer Service, Wait Time, Per-Wash Price, Membership Value; Tidal Wave Auto Spa | Car Wash doesn't have a clear win on any of the 7 pillars.
ModWash has the lower cancellation-friction rate (12.4% vs 19.5% of mem-discussing reviews) — a substantial gap. The dataset-wide rate is roughly 10–15%. Customers discuss memberships more often when reviewing Tidal Wave Auto Spa | Car Wash (12.8% 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 | Tidal Wave Auto Spa | Car Wash |
|---|---|---|
| Express Tunnel | 2.1% | 4.7% |
| Full Service | 3.6% | 2.6% |
| Hand Wash | 1.5% | 3.5% |
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 ModWash and Tidal Wave Auto Spa | Car Wash run as Express Tunnel chains — same format, same customer occasion. Brand, pricing, and location convenience drive the choice, not format differentiation.
Where do ModWash and Tidal Wave Auto Spa | Car Wash compete?
ModWash and Tidal Wave Auto Spa | Car Wash compete head-to-head in 11 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, Tidal Wave Auto Spa | Car Wash has more sites to choose from.
About ModWash vs Tidal Wave Auto Spa | Car Wash
ModWash vs Tidal Wave Auto Spa | Car Wash: which is bigger?
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Which has the higher customer rating, ModWash or Tidal Wave Auto Spa | Car Wash?
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Which has the lower damage rate, ModWash or Tidal Wave Auto Spa | Car Wash?
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Where do ModWash and Tidal Wave Auto Spa | 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 / Tidal Wave Auto Spa | 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.