Fuel & Generators · Nationwide · 24/7 emergency response
Fuel & Generators — Diesel Supply, Heating Oil and Backup Power That Never Falls
For a business, an institution or a factory, fuel isn't routine procurement — it's a condition for staying operational. A backup system is only ever as good as the diesel inside it. Dolek Energy brings the entire fuel-and-power envelope under one roof: continuous supply of transport diesel, heating oil and heating kerosene; quality-assured fuel for backup generators; scheduled and emergency refuelling 24/7; and generator rental and sale backed by maintenance and fuelling agreements — so that in the data centre, the hospital or the site, the power simply keeps flowing.
Years of experience · Nationwide coverage · 24/7 emergency response
[Hero image — fuel tanker connecting a delivery hose to a standby diesel generator storage tank at an industrial facility at dusk]
We don't sell litres — we guarantee uptime
When a delivery is late, when quality fails to meet the standard, or when there's no one to call under pressure, the cost isn't measured in litres — it's measured in hours of downtime. A truck engine that loses protection, a heating system that goes cold in the middle of winter, or a generator that won't start because the diesel degraded in the tank — each of these stops a line, a building or a critical site. At Dolek Energy we treat fuel and backup power as one continuous chain that operational continuity depends on, not as a one-off transaction.
That's the difference between a complete energy partner and a point of sale. From the first drop of diesel through to refuelling, fuel polishing, tank cleaning and generator maintenance — it all comes from a single party that understands your entire setup, plans ahead instead of reacting, and is reachable when something goes wrong. One supplier, one service experience, full accountability from end to end.
Fuel supply: diesel, heating oil and heating kerosene
Our fuel supply is built around the real needs of a business customer — variable volumes, steady frequency and full transparency on quality and delivery times. Under one roof we provide every fuel type your operation runs on.
General diesel supply
For any operational use — pumps, field equipment and any system that needs standard-grade diesel — with documentation available on request and a controlled supply chain designed to preserve fuel quality from source to your tank. Delivered on site via on-site fueling.
Transport diesel (EN 590)
Diesel for vehicles, heavy equipment and commercial fleets, in line with the European EN 590 standard for quality and composition. For haulage companies and fleets we build a steady supply in volume, planned around mileage and consumption — alongside engine oil and AdBlue, so the entire fuel-and-fluids package of the fleet comes from one source.
Heating oil / heating diesel (IS 701 Part 2)
Heating fuel for buildings, institutions and central-heating systems, in line with the relevant Israeli standard. Heating oil is a seasonal but mission-critical material — yeshivas, hotels, care homes, residential buildings and institutions cannot afford to go cold mid-season. We plan supply around the heating calendar so the tank is never empty when the temperature drops.
Heating Oil Supply →
Heating kerosene
For stoves, kerosene heaters and dedicated heating uses that require a clean, stable fuel — supplied to spec, in the quantities and packaging that match the application.
The generator is only half the story
Many organisations invest heavily in a quality backup generator, then treat the diesel inside it as a given. In practice, most backup failures don't come from a mechanical fault in the generator itself — they come from the fuel: diesel that aged in the tank, water that collected at the bottom, sludge and bacteria that clogged the filters, or a tank that ran dry at exactly the wrong moment. When the grid drops, there's no second chance.
Dolek Energy approaches the generator as a complete system, not a standalone unit. We don't just supply diesel and refuel — we take responsibility for the whole energy chain: fuel quality over time, a fill level that's maintained, filtration and polishing that bring the diesel back to standard, and emergency availability that means the tank is never left empty. That is what a full energy envelope means, as opposed to a point supplier.
Generator fuel, refuelling, rental and sale
Diesel for generators — quality you can rely on
Dedicated generator diesel that meets the relevant fuel standards and is suited to long-term storage in backup systems. We plan the supply schedule around consumption rate and the reserve you need, so the tank is always at a safe fill level — no last-minute surprises or stock checks.
Generator refuelling — scheduled and emergency 24/7
Routine refuelling on a pre-agreed plan, alongside round-the-clock emergency response for urgent supply. A critical system can't wait for business hours — Dolek's emergency line is available 24/7 for refuelling during a prolonged power cut, a heatwave, a winter event or any scenario where the generator shifts from backup to continuous running.
Generator rental — a complete solution, not just a machine
Short- and long-term generator rental, including transport, installation, connection, supervision and refuelling for the entire rental period. Suited to construction sites, events, infrastructure works, temporary backup during a system upgrade, or seasonal peak load — without you having to coordinate several separate suppliers.
Generator sale — with a maintenance and fuelling agreement
Generators matched to your power and usage requirement, together with maintenance and fuelling agreements that support the system across its life. We don't disappear after handover — the generator you buy stays part of a maintained, fuelled and backed-up energy envelope.
Fuel maintenance — polishing, filtration and tank cleaning
Diesel that sits in a backup tank degrades over time. We complete the picture with periodic fuel polishing and filtration to treat water, sludge and bacteria, and thorough tank cleaning when needed — so the diesel that flows to the generator at the moment of truth is sound, clean and reliable.
Who it's for
Whether it's a single residential building or a data centre with a critical generator array, the supply model is identical in professionalism and scaled to fit.
Data centres & server farms
Where a power drop is an SLA breach. Quality-assured diesel, continuous refuelling and immediate emergency response, with ongoing polishing and tank cleaning.
Hospitals & healthcare institutions
Where backup power is a matter of life safety: planned supply, a high reserve and emergency refuelling that doesn't depend on the hour.
Construction, infrastructure & heavy equipment
Where the generator is the primary power source on site: rental with on-site fuelling, operational flexibility and a response to peak loads.
Winter institutions, hotels & residential
Yeshivas, hotels, care homes and residential buildings that consume heating oil in season and need reliable backup for power-cut events.
Factories & industry
Where unplanned downtime costs a fortune, and the generator backs up the grid in moments of pressure.
Haulage companies & fleets
High-volume transport diesel on a steady, pre-planned schedule.
Standards & reliability
We work to the strictest standards in the industry: EN 590 · Israeli Standard 701 Part 2 · IEC 60296 · API CK-4 · DIN 51524-2 · ISO 6743-7
Fuel quality is the difference between a system that works and an expensive failure. Off-spec diesel, water or contamination in the tank damages engines, generators and heating systems — and is often discovered only when it's already too late. Every product we supply meets its relevant standard: transport diesel to EN 590, heating oil to Israeli Standard 701 Part 2, and further along the chain industrial oils to their international standards. COA / SDS documentation is available on request, so you always have proof of quality — not just a promise.
Diesel destined for long-term storage in a backup system deserves special attention: quality control, periodic filtration and preventive treatment so it doesn't deteriorate while it's "just waiting." This is exactly where the full-envelope advantage comes in — the same party that supplies the diesel is the one who keeps it sound.
How we work with you
A real advantage in a fuel and power partner isn't only the price per litre — it's the process that prevents surprises. We work to a clear method that ensures there's always sound fuel in the tank and a generator ready to run.
1. Scoping
We map your fuel types, the generator array, power ratings, tank volumes, consumption rate and how critical the system is.
2. Supply & refuelling plan
We build a fixed schedule or an on-demand order with defined delivery points, plus a pre-defined emergency track.
3. Controlled delivery & fuel maintenance
Supply and refuelling to plan, to standard and with documentation on request, alongside polishing, filtration and tank cleaning as needed.
4. Continuous readiness
Monitoring, documentation and 24/7 emergency response, so the tank is never empty and the generator is always ready for work.
Frequently asked questions
What diesel suits a backup generator, and why is it different from regular diesel?
A backup generator needs high-quality diesel intended for long-term storage. Unlike a vehicle that consumes fuel quickly, in a generator the diesel may sit in the tank for months, exposed to water, sludge and bacteria building up. We supply diesel that meets the standard and complement it with periodic polishing and filtration to keep it sound over time.
Do you offer 24/7 emergency refuelling?
Yes. Dolek's emergency line is available 24/7 for urgent refuelling and supply nationwide. The service is built precisely for situations where a generator shifts from backup to prolonged running — a long power cut, a heatwave or a winter event — and the tank empties faster than expected.
What's the difference between transport diesel and heating oil?
Transport diesel meets the EN 590 standard and is intended for vehicles, heavy equipment and diesel engines. Heating oil (heating diesel) is intended for heating systems and central heating and meets Israeli Standard 701 Part 2. They are different fuels in purpose and taxation, and we supply both.
Can I rent a generator with full fuelling and maintenance?
Yes. Our generator rental is a complete solution — transport, installation, connection, supervision and refuelling throughout the rental period. You get available electrical power without managing several suppliers or dealing with fuel logistics yourself.
How often should the fuel in a generator tank be maintained?
It depends on tank volume, storage conditions and consumption rate, but as a rule we recommend periodic polishing and filtration plus proactive tank cleaning. We build a fuel-maintenance plan tailored to your system to prevent the water, sludge and bacteria that could fail the generator at the moment of truth.
Which areas do you supply?
Nationwide, with a single service desk and one consistent customer experience — from the centre of the country to the north and the south.
Your backup system is only as good as the fuel inside it.
Tell us what your business runs on — transport diesel, heating oil, or fuel and backup for your generators — and we'll build a complete supply and refuelling plan: quality-assured fuel, scheduled and 24/7 emergency refuelling, and generator rental or sale with maintenance. So your power simply keeps flowing.