Fuel & Lube Oils

Boat engines

Harbor Fuels offers a full selection of diesel, gasoline, lube oils and additives to keep your engines running smoothly and efficiently, while ensuring optimum performance and longevity of your entire fuel system.

Neal at Harbor Fuels

Marine Diesel

We offer marine diesel for in both three-season and winter (December - March) blends.

Marine Gasoline

We carry only 89 octane marine gasoline for improved performance in your gasoline engines

Jet A Fuel

Harbor Fuels carries Jet A fuel compatible with all aircraft and helicopters and can meet your flashpoint needs.

Special note: Please allow 24-48 hours for all Jet A fuel requests, which can be made by calling, emailing, or using the convenient form on our website.

Vava helicopter

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Seaplane Fueling at Harbor Fuels

Lube Oils

Harbor Fuels offers a complete selection of lube oils for all your engine lubrication needs. Please allow 24-48 hours for delivery of lube oils.


Irving Oil & Lubricants

Since 1924 Irving Oil has developed a reputation for the highest quality products and services.  We produce and distribute over 1200 lubricant, chemical and DEF products for Canada, New England and around the world. Our products were formulated to exceed industry standards, reduce downtime and work as hard as you do.

Read more About Irving Oil & Lubricants


In addition to all common grades of fuel, we carry a full selection of fuel and engine oil additives to ensure maximum efficiency, performance, and longevity for every engine, under any conditions.


Valvtect is specially formulated for your marine diesel engine, improving lubricity, dispersing water, inhibiting corrosion and bacterial growth, and stabilizing your fuel for longer shelf life. The result? Lower maintenance and longer-lasting fuel system components.

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Star Tron

By adding Star Tron Enzyme Fuet Treatment to your tank, you’ll improve starting performance, while reducing emissions, preventing carbon deposits, and increasing fuel economy and cruising range. Regular use will keep your fuel injectors clean for better performance and longer life.

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Keep your engine running smooth and efficiently with K100 fuel additive. Because modern low-sulphur diesel lacks the lubricity necessary for optimum fuel system performance and longevity, adding K100 to your tank should be part of your refuelling ritual.

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Biobor is formulated to halt microbial growth, while also adding the lubricity that ultra-low sulphur diesel (USLD) lacks. It’s available in numerous formulations to meet your specific fueling needs.

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Marvel Mystery Oil

Add Marvel Mystery Oil to your fuel tank and to your engine crankcase for increased efficiency, improved lubrication, and longer wear. Marvel also improves starting and removes sludge from engine internals.

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Harbor Fuels