Carrier profile · USDOT 554371 · MC-383794 · Updated Jun 13, 2026

Diamond Oil Company

18 power unitsRegional · 3 statesDES MOINES, IA82/100

CARRIER ACTIVEMC-383794 ACTIVERATED SATISFACTORYHAZMAT

Observed fleet · trailing 24 mo daily

18Power units

Self-reported · MCS-150

—Trailers seen

None observed · 24 mo

—Avg age (yr)

Not yet decoded

Call dispatch(515) 244-4271 Email dispatchjnieto@diamondoilco.com

Click to see how we scored it

Load decision · FMCSA snapshot · Jun 13, 2026

Review before loading

Operating, but with flags a broker should weigh before tendering freight.

Watch · 2

Vehicle out-of-service rate well above average40.0% of vehicle inspections were placed out of service vs the 22.26% national average.MCS-150 update dueThe biennial MCS-150 update is overdue.

In good standing · 3

Active operating authorityActive for-hire authority is on file with FMCSA.Insurance on fileBIPD (liability) insurance is on file with FMCSA.Established 32 yearsOperating authority has been on file since 1994.

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$4M in force

FMCSA L&I

Vehicle OOS · 24-mo40.0%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$4M in force

FMCSA L&I

Vehicle OOS · 24-mo40.0%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

Vektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots

Fleet typeIdentity

Asset-based

18 power units. Brokers price each fleet type apart.

Fleet age vs peersDecoding

—

Not yet decoded

Identity stabilityStable

32 yr unchanged

Same registration since 1994 — no chameleon / reincarnation signal.

Safety

7 inspections · 24 mo · vs national benchmarks

Out-of-service rate· 24-mo cumulative · vs national

Vehicle OOS 40.0%24-mo cumulative

050%nat'l 22.26%

Driver OOS 0.0%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 5 vehicle and 7 driver inspections over 24 months.

Vehicle OOS rate· vehicle OOS · vehicle-level inspections · 6-month trailing

37.5% · latest 6-mo window▲ Rising

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending up 30.3 pts across the window. The national vehicle benchmark uses the same metric and is shown on the chart.

Roadside inspection history· 24 charted calendar months · vehicle / driver level · any-OOS overlay

6 inspections in the charted months · busiest month Dec '24 · 3

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections across the 24 charted calendar months. Bars show level-qualified vehicle and driver populations; one inspection can qualify for both. The line shows inspections with any out-of-service result.

Inspection coverage· expected vs observed · the fraud signal

Inspection coverage

How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.

Thin coverage

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.2 / unit·yr

thin signalabundant signal

Few roadside inspections for a 18-unit fleet — the out-of-service and violation signals above rest on a small sample, so weight them cautiously. Thin coverage on a young authority is itself a flag.

Registered power units: 18
Inspections · 24 mo: 7
Annualized: ≈4 / yr
Coverage: ≈0.2 inspections / unit · yr

Explore full safety record — inspections, BASICs, crashes

Authority & Insurance

Can they legally + adequately haul your load?

Operating authority· 49 CFR · per type

Operating authority

Common: None
Contract: Active
Broker: None

Insurance & bonds

BIPD / liability$4,000,000 in force

Cargo filing (census)Recorded per census

Surety bond (census)Not recorded per census

Insurance adequacy· filed BIPD vs the $750K federal floor

$4M in forcegeneral-freight federal minimum

$750K floor

Filed BIPD coverage of $4M meets or exceeds the $750K federal minimum for general freight (49 CFR 387.9). Some commodities (hazmat, larger vehicles) require $1M–$5M — confirm against your load.

Insurance continuity· insurer · policy · lapses

$750K BIPD last filed · 4 insurers · 0 lapsesInsurer churn

Federated’01–’18

Great West’02–now

Employers’19–’23

2000200720142021now

Shorter eras are too brief to label at this scale — all 6 insurers are named in the list below.

BIPD in force — $4,000,000 · FEDERATED MUTUAL INSURANCE CO. · since Dec 2001

All 6 insurer eras · dates, limits, renewals

Insurer	Period	Limit	Renewals
EMPLOYERS MUTUAL CASUALTY CO.	Nov 2019 → Dec 2023	$750K	1
EMCASCO INSURANCE COMPANY	Dec 2018 → Nov 2019	$750K	1
GREAT WEST CASUALTY CO.	Jan 2002 → current	$750K	2
FEDERATED MUTUAL INSURANCE CO.	Dec 2001 → Dec 2018	$750K	1
GREAT WEST CASUALTY CO.	Jun 2001 → Jan 2002	$750K	2
EMCASCO INSURANCE COMPANY	May 2000 → Jun 2001	$750K	1

Explore full authority & insurance record

Equipment

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 18
Observed power (24 mo): —
Trailers (towed): —

Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.

Explore full fleet — VIN roster, equipment mix, age distribution

Operations & Lanes

Revealed by inspection density across 3 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusRegional

revealed

States observed

US states

Inspections · 24 mo

IA busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base

DES MOINES, IA

702 SE RACCOON ST

Top corridor

IA 4 · NE 2 · SD 1

Density

fewermore

Shade = roadside inspections, last 24 mo.

See the full operating map — state density, top lanes

Network & Fraud

Affiliated entities & reincarnation signals · for review, not a verdict

Shares a company officer with other carriers

joe nieto — 2 carriers: USDOT 4478347

Explore the carrier network & VIN cross-links

Identity & Federal

FMCSA census + L&I dossier

Location

Physical address: 702 SE RACCOON ST, DES MOINES, IA, 50309
Operation: Interstate· Hazmat

Contact

Phone: (515) 244-4271
Fax: (515) 244-4273
Email: jnieto@diamondoilco.com
Web domain: diamondoilco.com

Registration

Officer: Joe Nieto
USDOT / docket: 554371 · MC-383794
First registered: Mar 23, 1994
Last MCS-150: Feb 28, 2024 · 1,200,000 mi (2023)
FMCSA safety rating: Satisfactory · May 30, 2019
D-U-N-S: —

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

1,200,000

Annual mileage

Open the full identity & federal record

Federal activity

Daily-captured FMCSA licensing & insurance changes — monitored by Vektor

Federal record activity· monitored daily by Vektor

No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.

Open the full federal-record activity feed

Reviews

Verified broker, shipper & driver reviews — moderated

Performance ratings only — never the Vektor risk score

No verified reviews yet

Be the first broker or shipper to rate DIAMOND OIL COMPANY. Reviews cover performance only — on-time delivery, payment speed, communication — and never affect the Vektor risk score.

Leave a review

Open reviews

Verification summaryAuthority, insurance, safety and identity facts for DIAMOND OIL COMPANY.

DIAMOND OIL COMPANY (USDOT 554371) has a Vektor safety score of 82/100 and a Review before loading verdict, from the carrier's FMCSA record refreshed Jun 13, 2026.

The carrier holds active contract for-hire operating authority per FMCSA L&I as of Jun 13, 2026.

It has an active BIPD insurance filing with a $4,000,000 limit in force from FEDERATED MUTUAL INSURANCE CO. effective Dec 1, 2001 in FMCSA L&I's current snapshot as of Jun 13, 2026.

Its vehicle out-of-service rate was 40.0% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier received 7 roadside inspections in the last 24 months — 5 vehicle-level and 7 driver-level — across 3 states, according to FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier has 0 reportable crashes in the last 24 months and 0 fatal crashes across the full FMCSA crash record available as of Jun 13, 2026.

It reports 18 power units and 32 drivers in its most recent MCS-150 filing dated Feb 28, 2024.

It has an FMCSA safety rating of Satisfactory assigned May 30, 2019 in the federal record refreshed Jun 13, 2026.

Frequently asked

What is DIAMOND OIL COMPANY's USDOT number?

DIAMOND OIL COMPANY's USDOT number is 554371, and its motor carrier number is MC-383794.

Is DIAMOND OIL COMPANY authorized to operate?

As of Jun 13, 2026, DIAMOND OIL COMPANY is active in the FMCSA register with common, contract, broker operating authority on file.

What is DIAMOND OIL COMPANY's safety record?

DIAMOND OIL COMPANY has a 40.0% vehicle out-of-service rate (national average 22.26%) across 19 roadside inspections, with 0 reportable crashes in the last 24 months, and an FMCSA "Satisfactory" safety rating. Vektor's computed risk score is 82/100 (tier: review).

How big is DIAMOND OIL COMPANY's fleet?

DIAMOND OIL COMPANY operates 18 power units and 32 drivers per its most recent MCS-150 filing.

Where is DIAMOND OIL COMPANY based?

DIAMOND OIL COMPANY is based in DES MOINES, IA, with roadside inspections recorded across 3 states.

Similar carriers near Des Moines, IA

Comparable carriers around Des Moines and across Iowa

M & M Cartage Inc Clear · 86Des Moines, IA · 17 power units

T&m Consolidated Company Clear · 88Des Moines, IA · 17 power units

Centennial Logistics LLC Clear · 94Des Moines, IA · 17 power units

Abeona and Adiona LLC Clear · 93Des Moines, IA · 16 power units

Argee Transport Co Clear · 100Des Moines, IA · 14 power units

JT Transportation LLC Clear · 100Des Moines, IA · 14 power units

Available Material Handling LLC Clear · 86Des Moines, IA · 13 power units

Potthoff Foods Company Inc Clear · 86Des Moines, IA · 11 power units

More in Iowa →Veteran carriers in Iowa →Largest fleets in Iowa →

More Iowa carriers

Other FMCSA-registered carriers near this one in the directory, by USDOT number.

Double C Trucking LLCBrighton · 4 power units Shon ConnellyClearMechanicsville · 7 power units Hageman Trucking IncMonona · 1 power unit Tim Ewoldt IncTraer · 1 power unit David D FrancyMount Pleasant · 1 power unit Larry L Lorenzen IncDysart · 2 power units