Ultra1Plus™ 15W-40 Motor Oils deliver exceptional protection and reliability for demanding engines, whether in commercial fleets, diesel trucks, or hardworking off-road equipment. Designed to handle extreme heat, heavy loads, and extended operating conditions, 15W-40 provides strong lubrication that resists oxidation, wear, and sludge formation. It’s the go-to choice for professionals who need dependable engine performance and longer oil life.
15W-40 oil is primarily used in engines that need Diesel engine oil, heavy-duty trucks, and equipment that operate under high load or long hours. Its thicker viscosity offers reliable protection against heat and friction.
While 5W-30 Motor Oil is ideal for passenger cars and colder climates, 15W-40 shines in hot, high-stress environments and for engines that require stronger film strength. The best choice depends on your vehicle type and driving conditions.
15W-40 Motor Oil performs exceptionally well in hot weather. It maintains its viscosity and film strength even at high temperatures, protecting the engine during long hauls or heavy towing, as well as our 10W-30 Motor Oil.
Its thicker consistency helps seal worn components, reduces oil burning, and provides better protection for aging engines that require High Mileage Motor Oil.
This oil is best suited for diesel pickups, heavy-duty trucks, commercial vans, and some performance cars that specify this grade. Always check your manufacturer’s recommendations before switching.
Some modern 15W-40 oils, like Ultra1Plus™ formulations with API SP or SN ratings, are safe for gasoline engines. However, always ensure compatibility with your vehicle’s specifications.
Typically, every 8,000 to 16,000 kilometers (5,000–10,000 miles), depending on your driving habits and engine load. Heavy-duty or commercial use may require more frequent changes; that’s why it’s important to know when to Change Your Motor Oil.
15W-40 works best in diesel and heavy-duty engines that operate under high temperature and pressure conditions, including trucks, buses, and industrial equipment that require heavy-duty motor Oil.
