Kenworth has announced it has selected the fuel economy-focused Chevron’s Delo(R) 400 XLE Synblend SAE 10W-30 as standard factory fill for new Kenworth Class 8 diesel trucks.

Kenworth’s Class 8 truck assembly plants in Chillicothe, Ohio, and Renton, Wash., will offer the oil as standard.

Delo 400XLE Synblend SAE 10W-30 is premium engine oil formulated with ISOSYN Technology, Chevron’s exclusive combination of base oil and additive technology. Chevron says the oil provides excellent wear and soot control protection and minimizes deposit formation for on-highway trucks using ultra low sulfur diesel (ULSD), and has shown an ability to deliver a fuel economy improvement in Class 8 trucks over 15W-40 oils while maintaining lubricity.

“Kenworth continually explores ways to offer products that help enhance our customers’ bottom line. We’ve been partners with Chevron for more than 20 years and their latest, fuel-efficient Delo 400 XLE Synblend 10W-30 oil provides a good opportunity for additional fuel efficiency gains,” said Kurt Swihart, Kenworth marketing director.