Certifications prove we've built the system. This page shows how that system works — from fuel selection to delivery sign-off — so you understand exactly what happens before, during, and after your fuel arrives.
In the petroleum supply chain, quality isn't created at the delivery point — it's preserved through every link in the chain. A single contamination event during transport, a missed test parameter, or a poorly maintained tanker can turn premium fuel into an engine-destroying liability.
At Hibernia Diesel, we operate five distinct control points where fuel quality is verified before it reaches your tank. Each gate has documented procedures, acceptance criteria, and escalation protocols.
Before we buy a single litre, our trading and quality teams evaluate the producer against comprehensive criteria. We maintain an Approved Supplier List (ASL) — no fuel is purchased from any source not on this list.
Before fuel is loaded into our tankers, our quality team performs systematic checks at the terminal or storage facility to verify the product before it ever enters our supply chain.
Once loaded, fuel quality must be preserved during transit. Our measures create an unbroken chain of custody from loading to delivery.
When the tanker arrives at your location, our driver and your designated receiver conduct a structured delivery verification procedure.
Quality doesn't end when the tanker leaves. Our post-delivery quality support ensures that any concerns are resolved quickly and transparently.
Click any parameter to learn why it's critical to your engines and operations.
Density affects fuel metering (volume vs. mass), combustion characteristics, and cold-weather performance. EN 590 diesel typically ranges 820–845 kg/m³. Significant deviation can indicate contamination, incorrect grade, or biodiesel blending beyond specification.
Sulfur is the single most critical diesel parameter for modern engines. Ultra-low sulfur diesel (≤10 ppm) is mandatory for Euro 5/6 vehicles with DPF and SCR systems. High-sulfur fuel destroys aftertreatment catalysts, clogs DPFs, and causes corrosive wear throughout the fuel system.
Cetane measures ignition quality — analogous to octane for gasoline. Higher cetane means easier cold starting, smoother running, lower noise, and reduced emissions. EN 590 requires a minimum cetane number of 51. Low cetane causes hard starting, white smoke, and increased engine wear.
Water in diesel causes corrosion in fuel injection systems, promotes microbial growth ("diesel bug"), freezes in cold weather, and degrades lubricity. Modern common-rail injectors operating at 2,000+ bar are extremely sensitive to water damage. Hibernia's target is ≤100 mg/kg at delivery — tighter than the EN 590 limit.
The distillation profile (T95 — the temperature at which 95% has evaporated) indicates the fuel's volatility and combustion completeness. A high T95 means heavy fractions that don't fully combust, causing deposits, oil dilution, and increased emissions. EN 590 T95 limit is ≤360°C.
Diesel fuel lubricates the fuel injection system. Ultra-low sulfur processing can strip natural lubricity compounds, increasing wear on injectors and pumps. EN 590 HFRR limit is ≤460 μm wear scar. Hibernia targets ≤400 μm, achieved through appropriate additive treatment.
Particulate contamination clogs fuel filters, abrades injector nozzles, and increases maintenance frequency. Contamination can originate from rust, dust, microbial debris, or additive precipitates. EN 590 limit is ≤24 mg/kg.
Hibernia Diesel maintains a documented chain of custody for every delivery. If your auditor, insurer, or regulator ever asks "Where did this fuel come from?" — we can answer, with documentation, within 24 hours.
As part of our ISO 9001-aligned quality management system, we operate a continuous improvement cycle — measuring, analyzing, improving, and reviewing.
Track quality KPIs: on-spec rate, on-time delivery, complaints, non-conformances
Quarterly quality reviews with root cause analysis of any deviations
Implement corrective and preventive actions (CAPA), verified through follow-up audits
Annual management review — is the QMS still fit for purpose? Are we meeting expectations?
Request a sample COA, schedule a facility visit, or ask us anything about how we ensure fuel quality.
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