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Take advantage of our Delo SmartChoice HDEO Product Tool below where you will find recommendations for the best heavy duty motor oil for your needs.

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Boaty's Transport Engine Teardown Testimonial

Delo® 400 ZFA SAE 10W-30 Delivering Excellent Protection and Improved Performance 

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The Power to go Further

ISOSYN Advanced Technology™

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Ozark Motors DD15

Delo® 400 XSP SAE 5W-30 and Delo® XLE providing extended fluid life and engine protection in Detroit™ DD15® engines.