However, generally, 5W-30 is a common and often recommended weight for the 4.0L engine in many years of Jeep Wranglers. In hotter climates, a slightly higher weight like 10W-30 might be suggested, while in colder climates, staying with 5W-30 is usually preferable.
Again, always check your owner's manual. The manual will specify the exact oil weight and viscosity recommended by Jeep for optimal performance and engine longevity. Ignoring this recommendation can lead to engine damage.
