DIAMOND OIL SERVICES LLC, DOT #2431488 FMCSA Safety & Compliance Report
DIAMOND OIL SERVICES LLC is a small fleet motor carrier based in VIENNA, Ohio (USDOT #2431488). As of 2026-10-15T04:44:01.199Z, it holds a Not Rated FMCSA safety rating and a FileFlo Carrier Intelligence Score of 60/100 (Moderate Risk), based on 16 recent inspection(s) and 44 recorded violation(s) in public FMCSA data.
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60/100 Moderate Risk
| Category | Score | Max |
|---|---|---|
| Safety Rating | 22 | 30 |
| Inspection Pass Rate | 10 | 20 |
| Out-of-Service Rate (vs FMCSA national avg) | 7 | 15 |
| CSA BASIC percentiles | Not measured | n/a |
CIS subtotal normalizes 3 publicly-available FMCSA components (Safety Rating + Inspection Pass Rate + OOS Rate) to a 0-100 surface. CSA SMS BASIC percentiles are not published in FMCSA's public Socrata datasets and the SMS portal at ai.fmcsa.dot.gov is not crawlable at scale, so we surface a transparent "Not measured" rather than fabricate a score component. Carriers with a Compliance Review on record may have published BASIC data on the SAFER snapshot for that DOT.
DIAMOND OIL SERVICES LLC: VIENNA, Ohio Trucking Company
DIAMOND OIL SERVICES LLC is a small fleet operating out of VIENNA, Ohio with USDOT number 2431488. The company operates 12 power units and has no published FMCSA safety rating (most active carriers are unrated unless they have undergone a compliance review). Based on our analysis of federal safety data, DIAMOND OIL SERVICES LLC has a FileFlo Carrier Intelligence Score (CIS) of 60/100, classified as Moderate Risk.
FMCSA Safety Record & Inspection History
DIAMOND OIL SERVICES LLC has undergone 16 recorded DOT inspections. The vehicle out-of-service rate is 25.0%, which is above the national average of 20.72%. This elevated rate indicates potential maintenance or pre-trip inspection deficiencies that could lead to roadside violations. The driver out-of-service rate is 6.3%, above the national average of 5.51%. Common causes include hours-of-service violations, expired medical certificates, and CDL issues.
Recorded Violations and Out-of-Service Status
The public FMCSA record for DIAMOND OIL SERVICES LLC carries 44 recorded violations, and the most recent inspection on file is dated 20260924. Across 16 recorded inspections, the record carries 1 driver out-of-service violation and 8 vehicle out-of-service violations.
A recorded violation is what an inspector wrote down at the roadside. It is not a penalty, and it is not an amount owed: FMCSA assesses civil penalties only after a compliance review classifies specific cited violations. The step that changes this record is the document behind each line, so the next move is to see which records an investigator would ask for and which of them exist today.
What a 60/100 Carrier Intelligence Score Means
A CIS score of 60 places DIAMOND OIL SERVICES LLC in the Moderate Risk category. While not in immediate danger of targeted enforcement, there are areas for improvement. Common issues at this level include inconsistent driver qualification file maintenance, lapsed vehicle inspection schedules, or minor CSA BASIC score creep.
Ohio Trucking Compliance: VIENNA Area Carriers
Motor carriers operating in Ohio must comply with both federal FMCSA regulations and state-specific transportation requirements. The VIENNA, OH corridor is monitored by FMCSA field offices and state highway patrol units conducting roadside inspections. Carriers based in VIENNA should ensure driver qualification files, vehicle inspection reports, and hours-of-service records are current and audit-ready at all times.
FileFlo helps Ohio trucking companies automate compliance document tracking across 600+ document types, including CDL medical cards, annual vehicle inspections, drug & alcohol testing records, and driver training certifications.
Authority Type, Hazmat Status, and Operating Profile
DIAMOND OIL SERVICES LLC is classified by FMCSA as an interstate carrier.
The carrier holds an Authorized For Hire classification, meaning it transports cargo or passengers for compensation under FMCSA operating authority and is subject to MC-number requirements at 49 CFR Part 365.
DIAMOND OIL SERVICES LLC is not flagged in FMCSA Census as a hazmat carrier (HM indicator: N), so the carrier is not subject to the additional 49 CFR Subchapter C hazmat regulations.
Operational range per MCS-150 filing: interstate within 100 miles (short-haul, 10 drivers); intrastate within 100 miles (10 drivers). The 100-mile boundary matters because drivers operating within a 100-air-mile radius qualify for the short-haul exception under 49 CFR 395.1(e)(1), which removes the requirement to maintain RODS for the day.
Self-reported MCS-150 annual mileage: 495,434 miles. MCS-150 mileage feeds the FMCSA SafeStat exposure denominator: drastically understated mileage can artificially inflate CSA BASIC percentile scores by reducing the per-mile exposure baseline. Updates are required every 24 months under 49 CFR 390.19.
Fleet Composition and Driver Profile
Owned equipment per the FMCSA Census filing: 6 straight trucks, 6 tractors, 8 trailers. Owned-vs-leased equipment matters for compliance documentation, owned trailers require the carrier to retain annual inspection certificates under 49 CFR 396.17, while leased trailers shift that documentation responsibility to the lease agreement.
The carrier reports 10 CDL-holding drivers on file. Each CDL driver must have a current Driver Qualification File (DQF) maintained per 49 CFR 391.51, including a Medical Examiner's Certificate, an annual MVR review, and a record of road-test results.
Intrastate driver count: 10. Intrastate drivers may be subject to state-specific CDL endorsement and hours-of-service variances depending on the state.
Primary cargo type per MCS-150: Water. Cargo type drives which BASIC categories the carrier is monitored under (Hazmat Compliance applies only to HM-flagged carriers; Cargo-Related Crash applies broadly).
FMCSA Crash History
The FMCSA Motor Carrier Management Information System (MCMIS) crash dataset records 5 crash events involving DIAMOND OIL SERVICES LLC in the available reporting window. Of these, 0 involved a fatality, 3 involved a reported injury, and 5 resulted in a tow-away. 5 events meet the federal-recordable threshold under 49 CFR 390.5 (fatality, injury treated away from the scene, OR tow-away of any vehicle).
Federal-recordable crashes feed the Crash Indicator BASIC in CSA: carriers above the intervention threshold are 7-10x more likely to be selected for a compliance review than peer carriers below the threshold. Insurance carriers also pull federal-recordable crash counts during quoting; a single recordable crash in a 24-month look-back can drive a 10-20% premium increase for owner-operators and small fleets.
Most recent recorded event: MIDDLESEX MERCER RD, LACKAWANNOCK TOWNSHIP, PA on 20260915.
DIAMOND OIL SERVICES LLC's Inspection Fingerprint: Geographic Pattern and Trend
Inspections cluster geographically across Ohio (9), Pennsylvania (5), West Virginia (2). The concentration in Ohio is consistent with the carrier's primary lanes and tends to correlate with which state DOT inspector teams DIAMOND OIL SERVICES LLC's drivers encounter most often at roadside checkpoints.
How DIAMOND OIL SERVICES LLC Compares to the National Average
Across the 16 recorded inspections, DIAMOND OIL SERVICES LLC's 25.0% vehicle out-of-service rate sits moderately above the FMCSA 2024 national average of 20.72%. The 6.3% driver out-of-service rate sits moderately above the 2024 national average of 5.51%. Vehicle OOS-rate variance is the strongest predictor of Vehicle Maintenance BASIC scores in CSA; driver OOS-rate variance is the strongest predictor of Hours-of-Service Compliance + Driver Fitness BASIC scores.
FMCSA's intervention thresholds (the percentile bands that trigger investigator outreach) are roughly 65th percentile for non-passenger non-hazmat carriers (75th for hazmat, 70th for passenger) on each BASIC. Carriers that consistently sit above the national average across multiple BASICs accumulate intervention risk faster than carriers with mixed performance. A single high BASIC alone rarely triggers enforcement; sustained over-threshold performance does.
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Recent DOT Inspections: DIAMOND OIL SERVICES LLC
Open any inspection for the records an auditor would ask for behind it: free, from USDOT 2431488, no signup.
| Date | State | Driver OOS | Vehicle OOS | Next step |
|---|---|---|---|---|
| 2026-09-24 | OH | 0 | 0 | Audit check |
| 2026-09-18 | OH | 0 | 0 | Audit check |
| 2026-09-15 | PA | 0 | 0 | Audit check |
| 2026-08-07 | OH | 1 | 0 | Audit check |
| 2026-07-31 | OH | 0 | 1 | Audit check |
| 2025-12-29 | OH | 0 | 0 | Audit check |
| 2025-10-07 | PA | 0 | 0 | Audit check |
| 2025-05-29 | PA | 0 | 0 | Audit check |
| 2025-05-20 | OH | 0 | 0 | Audit check |
| 2025-03-17 | OH | 0 | 0 | Audit check |
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Frequently asked questions about DIAMOND OIL SERVICES LLC
What is DIAMOND OIL SERVICES LLC's FMCSA safety rating?
DIAMOND OIL SERVICES LLC (USDOT #2431488) does not currently carry a published FMCSA safety rating. A "Not Rated" status is common for carriers that have never had a compliance review: it is not a negative finding. FileFlo scores the carrier at 60/100 (Moderate Risk) from the public inspection and out-of-service data that is available.
How large is DIAMOND OIL SERVICES LLC's fleet?
Per its most recent FMCSA MCS-150 filing, DIAMOND OIL SERVICES LLC operates 12 power unit(s) and 20 driver(s), classifying it as a small fleet. Fleet counts are self-reported to FMCSA and can lag a carrier's current operation.
Where is DIAMOND OIL SERVICES LLC based?
DIAMOND OIL SERVICES LLC is registered with the FMCSA at a physical address in VIENNA, Ohio, under USDOT number 2431488.
What is DIAMOND OIL SERVICES LLC's DOT inspection and violation history?
FileFlo shows 16 recent DOT inspection(s) and 44 recorded violation(s) for DIAMOND OIL SERVICES LLC (USDOT #2431488), sourced from FMCSA public records and the Socrata transportation datasets. The inspection table on this page lists dates, states, and out-of-service counts.
What is DIAMOND OIL SERVICES LLC's FileFlo Carrier Intelligence Score?
DIAMOND OIL SERVICES LLC scores 60/100 (Moderate Risk) on FileFlo's Carrier Intelligence Score. The score normalizes three public FMCSA components (safety rating, inspection pass rate, and out-of-service rate versus the national average) into one 0-100 surface. CSA SMS BASIC percentiles are not published in FMCSA's public data and are excluded rather than estimated.
Federal rules a carrier like DIAMOND OIL SERVICES LLC is audited against
The 49 CFR sections a DOT compliance review actually checks, plain-English:
- 49 CFR 395.8, Hours of service & ELD records
- 49 CFR 391.51, Driver qualification files (DQF)
- 49 CFR 396.3, Vehicle inspection, repair & maintenance
- 49 CFR 382.301, Pre-employment drug & alcohol testing
Compliance terms: CSA score · out-of-service order · hours of service · driver qualification file. See DOT compliance software & document management →
More Ohio carriers on file
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- VP EXPRESS TRANSPORT LLC, GALLOWAY (USDOT 2434635)
- MAGNUM TRANSPORTATION LLC, PARMA (USDOT 2435456)
- NDK SCRAPERS INC, SPENCER (USDOT 2437348)
- ROBERTSON CONSTRUCTION SERVICES INC, HEATH (USDOT 2437667)
- MTC HORTICULTURAL SERVICES LLC, OBERLIN (USDOT 2441583)
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Data sourced from FMCSA public records and the Socrata transportation dataset. Last updated: 2026-10-15T04:44:01.199Z. Information may not reflect the carrier's current status. Dispute this record · Claim this profile