Delo 400 LE Synthetic SAE 5W-40 is an all new, 100% synthetic engine oil that meets or exceeds all major API, ACEA and diesel engine manufacturers’ requirements.  The product is formulated using what’s described as “an optimal blend of the latest dispersant, detergent, oxidation inhibition, anti-wear, corrosion inhibition, viscosity improver, and defoaming additive technologies.” It’s the third Delo product to meet the API CJ-4 engine oil spec, the others being Delo 400 LE SAE 15W-40 and Delo 400 LE SAE 10W-30.

The new 5W-40 synthetic is formulated for both pre- and post-2007 heavy-duty engines as well as light-duty diesels. It’s said to offer excellent cold-startup capabilities and potential for improved fuel economy, while being fully backwards compatible with previous API categories.

Chevron says the benefits of the new Delo oil can include increased corrosion and wear protection for cylinders, pistons, rings, bearings and injectors; reduced valve and piston crown deposits; reduced oil consumption; improved combustion pressure; enhanced emission control system life; and improved fuel economy.