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Achieves 1,000,000+ kilometers in a Freightliner truck using Delo family of products.   

Associated Concrete mixer achieves 27,000 hours of vehicle life using the Delo family of products. 

Ozark Transport achieves double oil drain intervals using the Delo family of products. Hear how Delo provides extended service protection to Ozark Transport and has helped minimize operating costs. 


Delo with ISOSYN Technology gives you the performance, protection and confidence to help your business go further.

Learn about the Delo Difference through bench testing results as well as field testing showcasing our customer's stories.


Caltex lubricants stand for reliability. Properly lubricating the inside of a heavy-duty diesel engine requires more than just creating a protective film. Caltex’s advanced formula Delo® 400 LE SAE 15W-40 provides excellent oxidation resistance, deposit and oil consumption control and wear performance to protect against loss of engine performance and durability.

Delo Gold Ultra SAE 15W-40 is a premium diesel engine oil formulated to provide excellent long-drain performance, superb engine life protection and excellent everyday performance in all types of operations including stop-and-go, long haul and high stress operating conditions.


Delo Gold Ultra is a high performance, multigrade, heavy-duty diesel engine oil specifically designed to lubricate a wide range of engines requiring API CI-4 or ACEA E7 performance lubricants. Delo Gold Ultra is formulated with ISOSYN® technology.

Delo 400 LE SAE 15W-40 is a premium performance, “low-SAPS” heavy-duty diesel engine oil specifically designed to lubricate a wide range of high speed diesel engines requiring API CJ-4, CI-4 PLUS / SM, or ACEA E9 performance lubricants operating under the most severe service conditions.

Delo XLC is a non-nitrited extended life Antifreeze/Coolant formulation for heavy duty and light duty diesel vehicles and equipment. Delo XLC is formulated with an aliphatic corrosion inhibitor system available as a concentrate and a premix 50/50.