ModWash vs Spark Car Wash
Data updated · May 24, 2026
ModWash is larger (127 vs 16 locations); ModWash is rated higher (4.85★ vs 4.75★); ModWash has the lower reviewer-reported damage rate (0.83% vs 1.77%).
ModWash is a national-tier operator and Spark Car Wash is regional-tier, so they're competing at different scale points. ModWash edges ahead on review-weighted rating (4.85★ vs 4.75★, a narrow gap). On reviewer-reported damage, ModWash runs lower at 0.83% vs 1.77% — a modest 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). Spark Car Wash operates 16 locations across 4 states (4.0 per state). ModWash has a denser per-state footprint (10.6 sites/state vs 4.0 for Spark Car Wash), suggesting a more saturated regional strategy. Total customer signal is 182,068 Google reviews for ModWash (70,105 LLM-scored) vs 13,252 for Spark Car Wash (7,561 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 | Spark Car Wash | Winner |
|---|---|---|---|
| Wash Quality | +0.75 | +0.72 | ModWash |
| Staff & Customer Service | +0.94 | +0.90 | ModWash |
| Wait Time | +0.64 | +0.47 | ModWash |
| Per-Wash Price | +0.24 | +0.33 | Spark Car Wash |
| Equipment Working | -0.33 | +0.01 | Spark Car Wash |
| Facility Cleanliness | +0.79 | +0.92 | Spark Car Wash |
| Membership Value | +0.25 | +0.22 | ModWash |
ModWash's strongest aspect in customer reviews is Staff & Customer Service (+0.94); the weakest is Equipment Working (-0.33). Spark Car Wash's strongest is Facility Cleanliness (+0.92); the weakest is Equipment Working (+0.01). Head-to-head on the 7 pillars: ModWash wins on Wait Time, while Spark Car Wash wins on Equipment Working, Facility Cleanliness. The remaining pillars are too close to call.
Spark Car Wash has the lower cancellation-friction rate (11.1% vs 12.4% of mem-discussing reviews) — a modest gap. The dataset-wide rate is roughly 10–15%.
Do they operate the same format of car wash?
| Format | ModWash | Spark Car Wash |
|---|---|---|
| Express Tunnel | 2.1% | 4.1% |
| Full Service | 3.6% | 1.1% |
| Self-Serve Bay | 0.6% | 1.8% |
| Hand Wash | 1.5% | 0.4% |
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 Spark Car Wash compete?
ModWash and Spark Car Wash compete head-to-head in 1 metropolitan statistical area. 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 Spark Car Wash
ModWash vs Spark Car Wash: which is bigger?
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Which has the higher customer rating, ModWash or Spark Car Wash?
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Which has the lower damage rate, ModWash or Spark Car Wash?
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Where do ModWash and Spark 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 / Spark 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.