Greenhill Car Wash
Greenhill Car Wash is a 6-location express tunnel chain operating across 1 US state. The chain's weighted rating fell 0.48 stars (4.37★ → 3.89★) starting 2025-01.
Data updated · May 24, 2026
Key findings
- 6 express tunnel locations across 1 US state (largest footprint in Delaware).
- Weighted rating drifted from 4.37★ to 3.89★ starting 2025-01 — a sustained chain-wide decline.
- Built from 209 AI-extracted Google reviews scored across 55 dimensions.
6 locations across 1 states · dot size scales with review volume
Greenhill Car Wash's headline numbers don't tell the full story — there's a rating drift underneath them. Rating fell from 4.37★ to 3.89★ starting 2025-01, with wash result quality the leading complaint theme during the window. Operator-level drift analysis like this isn't something an individual Google Maps listing can surface.
Staff (+0.47) is the chain's strongest aspect signal — even during the drift window. The full review corpus (1,114) and the AI-scored subset (209) together drive the per-aspect signal.
About Greenhill Car Wash
How many locations does Greenhill Car Wash have?
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What is the average customer rating at Greenhill Car Wash?
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What is Greenhill Car Wash's damage rate?
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What format of car wash is Greenhill Car Wash?
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What do customers like most about Greenhill Car Wash?
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Where does Greenhill Car Wash have the most locations?
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How easy is it to cancel a Greenhill Car Wash membership?
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How have Greenhill Car Wash ratings and review volume trended over time?
28 months of monthly review velocity and rating data underpin the drift detection. Peak review volume: 19 reviews in 2024-10. The rating line below makes the inflection point easy to spot — the volume bars show whether customer flow tracked with the quality shift.
Monthly review volume
28 monthsAverage star rating by month
scale 1–5What customers love about Greenhill Car Wash
- Staff
- +0.47
- Wash Quality
- +0.35
- Per-Wash Price
- +0.20
Where customers complain about Greenhill Car Wash
- Equipment Working
- -0.49
Aspect score = (pos − neg) / (pos + neg + mixed), range −1 to +1. See per-pillar leaderboards →
Operational health signals
How much competition does Greenhill Car Wash face at each site?
Competitive landscape per location: 5.3 avg within 1 mile, 11.8 within 3. Useful context for the drift — denser markets give customers more places to switch to.
Per-site competitor counts use haversine distance against the WashIndex location index; sister sites in the same chain are excluded.
What amenities do customers mention at Greenhill Car Wash?
Customer-mentioned amenities at Greenhill Car Wash; the percentages show how often each amenity comes up in reviews. Drift periods tend to surface specific amenity complaints (broken vacuums, missing dryers).
Which metros and cities does Greenhill Car Wash have locations in?
Greenhill Car Wash operates across the metros and cities below. Each link drills into the WashIndex per-metro or per-city market analysis, with Greenhill Car Wash's position alongside every other operator.
Alternatives to Greenhill Car Wash
The chains that compete with it most directly, compared.
Which states does Greenhill Car Wash operate in?
Footprint: 6 locations across 1 state. concentrated in Delaware (6). Per-state rating column below is where to look for geographic attribution of the drift.
| State | Locations | Total Reviews | Avg Rating |
|---|---|---|---|
| Delaware | 6 | 1,114 | 4.24 |
What are the top Greenhill Car Wash locations by review volume?
All 6 Greenhill Car Wash locations below. Expand any row for the site's monthly velocity, competitor rings, and aspect-level signals — useful for attributing the drift.
4.3 496 reviews 17 / 34 / 41
Trade-Area Competitors
- Kj's Detailing 0.06 mi · 1.0★
- Self service car wash 0.13 mi · 3.1★
- The Professionals Auto Detailing Salon 0.16 mi · 5.0★
- Truly Elite Auto Detailing 0.41 mi · 5.0★
- Asbeck Custom Car Audio LLC 0.46 mi · 4.8★
Operational Signals
- Facility Cleanliness +1.00
- Membership Value -1.00
- Equipment Working -0.78
- Wait Time +0.50
Monthly Review Velocity
Middletown, DE 890 Middletown Warwick Rd 4.2 181 reviews 0 / 12 / 3
Trade-Area Competitors
Operational Signals
- Equipment Working -1.00
- Staff +0.71
- Wash Quality +0.44
- Per-Wash Price +0.33
Monthly Review Velocity
Middletown, DE 299 E Main St 3.9 146 reviews 8 / 5 / 8
Trade-Area Competitors
- mega mobile wash and detailing 0.45 mi · 5.0★
- james geter done detail 0.63 mi
- Exquisite Detailing 0.70 mi · 4.9★
- Attention to Detail Mobile Auto Detailing 0.70 mi · 5.0★
- Auto Recon 0.85 mi · 5.0★
Operational Signals
- Per-Wash Price +1.00
- Staff +1.00
- Equipment Working +1.00
- Facility Cleanliness +1.00
Monthly Review Velocity
Millsboro, DE 32517 Long Neck Rd 4.5 118 reviews 0 / 8 / 4
Trade-Area Competitors
Operational Signals
- Wait Time -1.00
- Facility Cleanliness +1.00
- Wash Quality +0.45
- Per-Wash Price +0.25
Monthly Review Velocity
4.1 89 reviews 3 / 6 / 43
Trade-Area Competitors
- Shell 0.11 mi · 3.4★
- Towne & Country Car Salon 0.63 mi · 4.8★
- bp 0.93 mi · 4.1★
Operational Signals
- Facility Cleanliness +1.00
- Wait Time +0.56
- Equipment Working -0.50
- Wash Quality +0.40
Monthly Review Velocity
Georgetown, DE 33016 Finley Ave 4.3 84 reviews 4 / 6 / 19
Trade-Area Competitors
- Shell 0.12 mi · 3.7★
- Greenhill Car Wash 0.26 mi · 4.9★
- 302DripCo. 0.67 mi · 5.0★
- Kleen Kat Car Wash 0.82 mi · 4.0★
Operational Signals
- Facility Cleanliness +1.00
- Membership Value +1.00
- Staff +0.77
- Equipment Working -0.50
Monthly Review Velocity
Data as of 2026-05-24. Pick a format and click Copy.
WashIndex. (2026, May 24). Greenhill Car Wash — WashIndex operator profile. https://washindex.com/car-wash-chains/greenhill-car-wash
WashIndex. "Greenhill Car Wash — WashIndex operator profile." WashIndex. Last modified May 24, 2026. https://washindex.com/car-wash-chains/greenhill-car-wash.
"Greenhill Car Wash — WashIndex operator profile." WashIndex, May. 24, 2026, https://washindex.com/car-wash-chains/greenhill-car-wash.
@misc{washindex_car_wash_chains_greenhill_car_wash_2026,
title = {{Greenhill Car Wash — WashIndex operator profile}},
author = {{WashIndex}},
year = {2026},
month = {May},
url = {https://washindex.com/car-wash-chains/greenhill-car-wash},
urldate = {2026-05-24},
} About this profile
Every operating-quality signal on this page is derived from 209 customer reviews of Greenhill Car Wash locations, processed through WashIndex’s 55-field LLM extraction pipeline. Competitor counts within 1 / 3 / 5 mi rings are computed by haversine distance against the WashIndex location index across the chain’s states and immediately adjacent ones (sister sites in the same chain are excluded). Monthly review and rating trends are pulled from the raw Google Maps review feed. 0 spam-flagged reviews were excluded from the aggregates.
See our full methodology for the extraction pipeline, validation samples, and aggregation logic. Term definitions in the glossary.
Machine-readable: JSON ↓ · API root
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