DALLAS, Texas — Chevron has introduced a new Delo 400 LE synthetic 5W-30 engine oil it says can improve fuel mileage by up to 2% in Class 8 long-haul vehicles and 4.5% in medium-duty trucks.

The oil was formulated to maximize fuel economy while also meeting engine manufacturers’ performance requirements, Chevron announced at the Great American Trucking Show.

The fuel-saving potential is in comparison to SAE 15W-40 oil and has been validated through SAE J1321 fuel consumption testing, Chevron says.

The new oil compliments Chevron’s Delo 400 LE SAE 10W-30 oil to provide a line of oils that excel at improving fuel economy without sacrificing engine durability, the company claims. It insists its fuel-efficient engine oils have proven through lab and field durability tests to match 15W-40 oils in engine wear and drain intervals.

“We understand that many of our customers are focused on managing fuel costs. Lubricants can play an important role in improving fuel economy, allowing fleet owners to reduce operating costs and stay competitive,” said Jim Gambill, North America Commercial and Industrial brand manager, Chevron. “Chevron is committed to helping its customers decrease expenses by delivering products designed to reduce fuel consumption. Our new Delo 400 LE Synthetic SAE 5W-30 is part of Chevron’s vision to offer a line of lubricants that deliver fuel economy without sacrificing engine or component durability.”

In addition to improved fuel mileage, Chevron says its newest offering provides consistent cold engine staring, minimizes operating costs and extends emission control system life. Delo 400 LE Synthetic SAE 5W-30 will be available across North America in the fourth quarter of 2012, Chevron announced.