OK Petroleum keeps Islip, NY homes warm with reliable home heating oil delivery, transparent per-gallon pricing, and the friendly local service of a family-owned Long Island company.
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Islip sits at the heart of Suffolk County's South Shore, and its homeowners have leaned on OK Petroleum for dependable home heating oil since 1976. We are a family-owned Long Island company, which means every heating oil delivery in Islip, NY is handled by people who share your winters and understand what a reliable supplier really means.
We keep pricing honest and easy to understand. Before you check out, you will see a transparent per-gallon price and confirm your total, so there are no hidden fees waiting to surprise you. Order anywhere from 50 to 500 gallons or a full fill, and pay only for the home heating oil your household actually uses.
What sets OK Petroleum apart along the South Shore is a rare mix of speed, honesty, and true local service. Most orders arrive same-day or next-day, our drivers know the roads through Islip and nearby East Islip and Bay Shore, and there is never a distant call center standing between you and a warm home.

OK Petroleum has been part of Long Island since 1976, growing from a small family operation into a trusted heating oil supplier for Suffolk County towns like Islip. Through all of that growth, we have stayed family-owned and operated, and we have never lost sight of the local roots that started it all.
Our drivers are part of this community, so they know Islip and its neighbors in Islip Terrace, Great River, and Central Islip the way only locals can. That knowledge makes every home heating oil delivery faster and more precise, and it means the person filling your tank is genuinely familiar with the streets of your town.
Above everything, we exist to keep Islip homes warm through cold Long Island winters. We treat each home heating oil order as a personal promise, guiding it from the first call to the final gallon without handing you off to an outsourced call center. It is the kind of dependable, neighborly service Suffolk County families have trusted for nearly fifty years.

Placing a home heating oil order for your Islip home takes only a few minutes online or through our mobile app, and the four straightforward steps below walk you through everything from order to delivery.
Pick 50 to 500 gallons — or a full fill.
We confirm we deliver to your ZIP instantly.
Transparent per-gallon pricing, no surprise fees.
Fast, reliable delivery you can count on.
OK Petroleum delivers home heating oil throughout Islip, NY and the 11751 ZIP code, serving homes from the village center down toward the water. No matter where your property sits in this stretch of Suffolk County, our trucks are ready to reach it and fill your tank promptly.
Our home heating oil delivery reaches well beyond Islip proper, covering the neighboring South Shore communities of East Islip, Islip Terrace, Bay Shore, Great River, and Central Islip. Families across this part of Long Island count on our fast turnaround, with most orders arriving same-day or next-day and low tanks getting priority during severe winter cold.
For a worry-free season, ask us about automatic delivery. The system tracks both the weather and your usage and schedules your next home heating oil delivery before your tank runs empty, so Islip homeowners are never caught off guard by a cold morning. Set it up once and enjoy steady warmth from the first frost to the last.
We deliver home heating oil throughout Islip and nearby Suffolk County communities including East Islip, Islip Terrace, Bay Shore, and Great River. Most orders arrive same-day or next-day.
Our orders range from 50 gallons up to 500 gallons, and you can also request a full fill. You never have to buy more than you need.
Yes. You will see a clear per-gallon price and confirm the total before checkout, with no hidden fees or surprise charges.
Definitely. Automatic delivery watches the weather and your usage and tops off your tank before it runs low, keeping your Islip home warm all winter long.