Difference between 10w30 and 15w40
- 10w30 is a thinner oil that is suitable for use in cold weather conditions. The "10w" refers to the oil's viscosity at 0°F, and the "30" refers to its viscosity at 100°C (212°F).
- 15w40 is a thicker oil that is suitable for use in hot weather conditions. The "15w" refers to the oil's viscosity at 0°F, and the "40" refers to its viscosity at 100°C (212°F).
Using an oil that is too thin for the weather conditions can lead to inadequate lubrication and potential engine damage. Conversely, using an oil that is too thick can cause the engine to run hot and also lead to engine damage.
For all these reasons, it's important to use the type of oil that is specified in your diesel truck's owner's manual.
