Lubricant Specialists since1985
Castrol Assuron (SAE 10W, 20, 30, 40, and 50) are high performance, heavy-duty engine oils that couple selected base stocks with a carefully balanced additive package. Castrol Assuron (SAE 10W, 20, 30, 40, and 50) by design will enhance engine performance and protect engine parts for extended life and reduced maintenance costs. Castrol Assuron (SAE 10W, 20, 30, 40, and 50) has proven performance in various on-and off-highway heavy-duty diesel engines, particularly in applications requiring API CF-2.

Castrol Assuron (10W, 20, 30, 40, and 50) are extremely resistant to the formation of high temperature deposits. The higher dispersant package also works to keep the cooler areas of the engine from sludge and other harmful deposits.

Castrol Assuron (10W, 20, 30, 40, and 50) exceeds the requirements of the following API categories: SAE 10W (CF), 20 (CF), 30 (CF-2, CF), 40 (CF-2, CF), 50 (CF-2, CF). Castrol Assuron meets the requirements of General Motors Corp. (Allison Trans. Div.) C-4.
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Item Name

SAE Grade

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N/A Assuron® 10W N/A 10W N/A 260 Gallon Tote QUOTE Add To Cart
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N/A Assuron® 10W N/A 10W N/A 55G Drum QUOTE Add To Cart
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N/A Assuron® 10W N/A 10W N/A 5G Pail QUOTE Add To Cart
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N/A Assuron® 10W N/A 10W N/A Bulk QUOTE Add To Cart
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N/A Assuron® 30 N/A 30 N/A 260 Gallon Tote QUOTE Add To Cart
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N/A Assuron® 30 N/A 30 N/A 55G Drum QUOTE Add To Cart
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N/A Assuron® 30 N/A 30 N/A 5G Pail QUOTE Add To Cart
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N/A Assuron® 30 N/A 30 N/A 4/1 Gallon QUOTE Add To Cart
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N/A Assuron® 30 N/A 30 N/A Bulk QUOTE Add To Cart
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N/A Assuron® 40 N/A 40 N/A 260 Gallon Tote QUOTE Add To Cart
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N/A Assuron® 40 N/A 40 N/A 55G Drum QUOTE Add To Cart
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N/A Assuron® 40 N/A 40 N/A 5G Pail QUOTE Add To Cart
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N/A Assuron® 40 N/A 40 N/A 4/1 Gallon QUOTE Add To Cart
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N/A Assuron® 40 N/A 40 N/A Bulk QUOTE Add To Cart
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N/A Assuron® 50 N/A 50 N/A 260 Gallon Tote QUOTE Add To Cart
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N/A Assuron® 50 N/A 50 N/A 55G Drum QUOTE Add To Cart
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N/A Assuron® 50 N/A 50 N/A 5G Pail QUOTE Add To Cart
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N/A Assuron® 50 N/A 50 N/A Bulk QUOTE Add To Cart
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