Jax Kar Wash vs ModWash
Data updated · May 24, 2026
ModWash is larger (127 vs 48 locations); ModWash is rated higher (4.85★ vs 4.16★); ModWash has the lower reviewer-reported damage rate (0.83% vs 3.31%).
Jax Kar Wash is a regional-tier operator and ModWash is national-tier, so they're competing at different scale points. ModWash edges ahead on review-weighted rating (4.85★ vs 4.16★, a meaningful gap). On reviewer-reported damage, ModWash runs lower at 0.83% vs 3.31% — a meaningful operating-quality gap. The dataset-wide average across all car wash chains is roughly 1–3%.
| Metric | Jax Kar Wash jaxkarwash.com | ModWash modwash.com |
|---|---|---|
| Locations | 48 2 states | 127 12 states |
| Reviews | 28,319 9,285 LLM-scored | 182,068 70,105 LLM-scored |
| Avg rating | 4.16 | 4.85 |
| Damage rate (lower better) | 3.31% | 0.83% |
| Membership cancellation friction (of mem-discussing reviews) | 13.1% | 12.4% |
| Dominant format | Express Tunnel | Express Tunnel |
Jax Kar Wash operates 48 locations across 2 states (24.0 sites per state on average). ModWash operates 127 locations across 12 states (10.6 per state). Jax Kar Wash has a denser per-state footprint (24.0 sites/state vs 10.6 for ModWash), suggesting a more saturated regional strategy. Total customer signal is 28,319 Google reviews for Jax Kar Wash (9,285 LLM-scored) vs 182,068 for ModWash (70,105 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 | Jax Kar Wash | ModWash | Winner |
|---|---|---|---|
| Wash Quality | +0.19 | +0.75 | ModWash |
| Staff & Customer Service | +0.46 | +0.94 | ModWash |
| Wait Time | +0.04 | +0.64 | ModWash |
| Per-Wash Price | -0.27 | +0.24 | ModWash |
| Equipment Working | -0.71 | -0.33 | ModWash |
| Facility Cleanliness | +0.39 | +0.79 | ModWash |
| Membership Value | -0.03 | +0.25 | ModWash |
Jax Kar Wash's strongest aspect in customer reviews is Staff & Customer Service (+0.46); the weakest is Equipment Working (-0.71). ModWash's strongest is Staff & Customer Service (+0.94); the weakest is Equipment Working (-0.33). ModWash comes out ahead on Wash Quality, Staff & Customer Service, Wait Time, Per-Wash Price, Equipment Working, Facility Cleanliness, Membership Value; Jax Kar Wash doesn't have a clear win on any of the 7 pillars.
ModWash has the lower cancellation-friction rate (12.4% vs 13.1% of mem-discussing reviews) — a narrow gap. The dataset-wide rate is roughly 10–15%. Customers discuss memberships more often when reviewing Jax Kar Wash (20.9% 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 | Jax Kar Wash | ModWash |
|---|---|---|
| Express Tunnel | 9.9% | 2.1% |
| Full Service | 8.0% | 3.6% |
| Hand Wash | 1.8% | 1.5% |
| Detail Shop | 1.6% | 0.4% |
| Self-Serve Bay | 1.2% | 0.6% |
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.
Format-mix-wise, Jax Kar Wash and ModWash are matched: both lean Express Tunnel. The differentiator isn't what they do, it's how they do it.
Where do Jax Kar Wash and ModWash compete?
These two chains don't overlap geographically — no shared US MSAs in the WashIndex dataset. 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 Jax Kar Wash vs ModWash
Jax Kar Wash vs ModWash: which is bigger?
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Which has the higher customer rating, Jax Kar Wash or ModWash?
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Which has the lower damage rate, Jax Kar Wash or ModWash?
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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 — Jax Kar Wash / ModWash — 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.