OK Petroleum delivers dependable home heating oil to Seaford, NY, with transparent per-gallon pricing and fast service across Nassau County.
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Seaford homeowners want a heating oil company that treats them fairly and delivers without fail, and OK Petroleum has done exactly that since 1976. As a family-owned home heating oil supplier serving Nassau County, we have kept South Shore homes warm through nearly five decades of Long Island winters.
Straightforward pricing is a cornerstone of our service. We confirm your per-gallon rate before you check out, with no hidden fees and no last-minute surcharges. Whether a Seaford family orders a quick 50-gallon top-off or a full tank, the price on the screen is the price at the door, every single time.
Our reliability is just as important. Almost fifty years of oil delivery on Long Island have taught us how to route efficiently and respond fast when the cold arrives. Homeowners in Seaford, Wantagh, and Bellmore keep coming back because we bring the experience of a seasoned company with the warmth of a local, family-run team.

OK Petroleum has been family-owned and operated on Long Island since 1976. From our base in Hauppauge, we deliver home heating oil throughout Nassau County, and Seaford has long been one of the South Shore communities we serve.
Our drivers are Long Islanders who know Seaford and the surrounding Nassau County neighborhoods. They understand how a coastal freeze can pull down a home heating oil tank quickly, so they plan their routes to keep deliveries prompt and dependable, even during the busiest stretches of winter.
For nearly fifty years our mission has stayed the same: keep Seaford homes warm and its families comfortable. Ordering from OK Petroleum means working with a real local team that answers the phone and stands behind every gallon, not a faceless corporation. That personal service is what has earned the loyalty of Seaford families for generations, and it is the reason so many South Shore homeowners rely on us for their home heating oil year after year.

Ordering home heating oil in Seaford could not be easier. Pick your gallons online or in our app, confirm your price, and choose a delivery date that works for you.
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 Seaford and the 11783 ZIP code, along with neighboring Nassau County communities such as Wantagh, Bellmore, and Massapequa. If you heat with oil on the South Shore, our trucks can bring it to your door.
Fast service is essential when temperatures fall, so we make dependable timing our priority. Most Seaford orders arrive same-day or next-day, and we stay on the road through the coldest weeks of the Northeast winter. You can also add Howes winter fuel treatment to any order to help prevent gelling in extreme cold.
Prefer not to think about your tank at all? Our automatic delivery service tracks the local weather and your usage, then schedules a refill before you run low, so your Seaford home stays warm all season. Every delivery comes with the transparent per-gallon pricing and friendly local team that have defined OK Petroleum since 1976.
Most home heating oil orders in Seaford are delivered same-day or next-day. Order online or call 631-994-1277 to schedule your Nassau County delivery.
You can order as little as 50 gallons and up to 500, or request a full fill. This lets Seaford homeowners buy exactly what their home needs.
No. We confirm a transparent per-gallon price before checkout, so the amount you see is exactly what you pay in Seaford.
Yes. Our automatic delivery keeps your Seaford home stocked by monitoring weather and usage, refilling your tank before it runs empty.