Diesel Engine Oils

The Tougher,
The Better.

Reliability for diesel engines

Keep your fleet running smoothly with our collection of signature, heavy-duty diesel engine oils from Petro-Canada. DURON™ Next Generation is an extremely durable, high performance engine oil that delivers less downtime, better fuel economy and higher productivity, keeping your trucks on the road.

We also feature Ralube, a chlorine and zinc-free engine oil that delivers protection for severe service locomotive, marine and stationary engine oils. See below for our list of diesel engine oils, and get in touch with us today for more details!

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Talk to us today about the many benefits of obtaining an account with Castle Fuels. We would be glad to arrange both business credit accounts as well as personal credit accounts.

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OUR RECOMMENDED
PRODUCTS

Most Popular Product

DURON HP 15W-40

DURON HP High Performance engine oil brings multigrade performance driven by the new category demands of API CK-4.
Tech Data Sheet

DURON HP 10W-40

DURON HP High Performance engine oil brings multigrade performance driven by the new category demands of API CK-4.
Tech Data Sheet

DURON SHP 15W-40

DURON SHP is one of the most durable super high performance heavy duty diesel engine oils we have ever made in order to meet the demands of the new API CK-4 service category.
Tech Data Sheet

DURON SHP 10W-30

DURON SHP is one of the most durable super high performance heavy duty diesel engine oils we have ever made in order to meet the demands of the new API CK-4 service category.
Tech Data Sheet

DURON UHP 5W-30

DURON UHP 5W-30 is an ultra high performance full synthetic engine oil to meet the ultra tough demands of the API CK-4 category.
Tech Data Sheet

DURON UHP 0W-40

DURON UHP 0W-40 is an ultra high performance full synthetic engine oil designed to meet the ultra tough demands in off-road extreme environments. Even down to -35°C.
Tech Data Sheet

DURON UHP 5W-40

DURON UHP 5W-40 is an ultra high performance full synthetic engine oil formulated to deliver ultra durability and protection to your engine during cold start up. Even down to -30°C.
Tech Data Sheet

DURON UHP 0W-30

DURON UHP 0W-30 is an ultra high performance full synthetic engine oil to meet the ultra tough demands of many off-road industries.
Tech Data Sheet

DURON UHP 10W-40

DURON UHP 10W-40 is an ultra high performance synthetic engine oil designed to meet the toughest demands of the new API CK-4 category.
Tech Data Sheet

Monograde Engine Oils

DURON Monograde Engine Oils are proven in many applications, including mining, construction, and agriculture.
Tech Data Sheet

GEO LD 15W-40 & 10W-30

Specifically formulated for the high combustion temperatures in today’s natural gas mobile engines. DURON GEO LD also provides premium performance for heavy-duty diesel and gasoline engines.
Tech Data Sheet

ralube 940CF

RALUBE™ is designed for severe service locomotive, marine and stationary power generators.
Tech Data Sheet

ralube 40CFS

RALUBE™ is designed for severe service locomotive, marine and stationary power generators.
Tech Data Sheet

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For your fuel needs

With Castle Fuels, you can keep your fleet running on the road with no hiccups. We serve the BC Interior with bulk fuel, DEF, lubricants and equipment. We are an increasingly attractive supply alternative with competitive pricing and reliable service to both large and small customers. Castle Fuels features Petro-Canada products.

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