Diamond Oil Company is an active interstate carrier based in Des Moines, IA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 6 | 0 | 0 |
| Tractors | 12 | 0 | 0 |
| Trailers | 10 | 0 | 0 |
| Total Power Units | 43 | ||
Distinct vehicles · 24 mo
vs 43 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 20% | 81% | Better than most peers |
| HOS Compliance | 86% | 96% | Worse than most peers |
| Driver Fitness | 92% | 96% | Worse than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 34% | 86% | Around peer average |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 2 | — | 22.26% |
| Hazmat | 2 | 0 | 0.00% |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 9 | 1 | 3 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Jul 18, 2025 | IA | STRAIGHT TRUCK | 1 | 0 |
| Jan 16, 2025 | SD | TRUCK TRACTOR | 1 | 1 |
| Dec 23, 2024 | IA | STRAIGHT TRUCK | 0 | 0 |
| Dec 17, 2024 | IA | TRUCK TRACTOR | 6 | 1 |
Carriers that share an officer, phone, or email with this DOT.
Shared officer · 1
Shared phone · 1
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 1 | 0.13 | — |
| HOS Compliance | 1 | 1.00 | — |
| Vehicle Maintenance | 3 | 3.83 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 3 states. Top state IA accounts for 62% of activity. Activity outside home state (IA): 38%.
| Hours-of-Service Compliance |
| 3 |
| 1 |
| 0 |
| Hazardous Materials Compliance | 2 | 0 | 1 |
| Driver Fitness | 1 | 1 | 1 |
| Unsafe Driving | 1 | 0 | 0 |
| Dec 4, 2024 | NE | STRAIGHT TRUCK | 0 | 0 |
| Nov 20, 2024 | IA | STRAIGHT TRUCK | 1 | 0 |
| Aug 15, 2024 | NE | STRAIGHT TRUCK | 0 | 0 |
| Jun 27, 2024 | SD | TRUCK TRACTOR | 0 | 0 |
| Jun 18, 2024 | NE | STRAIGHT TRUCK | 2 | 2 |
| Jun 4, 2024 | IA | TRUCK TRACTOR | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Jul 18, 2025 | 3922SLLS2 | State/Local Laws - Speeding 6-10 miles per hour over the speed limit | Unsafe Driving | — |
| Jan 16, 2025 | 39375A3TAOLTIS | Tires - All others leaking in tread area and inflation less than 50% of the maximum inflation pressure on tire equipped with ATIS | Vehicle Maintenance | Yes |
| Dec 17, 2024 | 39311TL | Truck-Tractor lower rear mud flaps retroreflective sheeting / reflex reflective material requirements for vehicles manufactured after July 1997 | Vehicle Maintenance | — |
| Dec 17, 2024 | 39345B2PC | Brake Hose or Tubing Chafing and/or Kinking - Connection to Power Unit | Vehicle Maintenance | Yes |
| Dec 17, 2024 | 3939 | Inoperable Required Lamp | Vehicle Maintenance | — |
| Dec 17, 2024 | 39522G | Portable ELD not mounted in a fixed position and visible to driver | Hours-of-Service Compliance | — |
| Dec 17, 2024 | 39524C2III | Driver failed to manually add shipping document number | Hours-of-Service Compliance | — |
| Dec 17, 2024 | 3958E | False report of drivers record of duty status | Hours-of-Service Compliance | — |
| Nov 20, 2024 | 3939 | Inoperable Required Lamp | Vehicle Maintenance | — |
| Jun 18, 2024 | 172504A | Vehicle not placarded as required | Hazardous Materials Compliance | Yes |