On the Road Advice: | Insights from Shell Rotella Specialists | | Why Do I Have to Top-Off Oil in My Engine? | Most of you probably check your oil level each day or when you fill your fuel tank. A low oil level can lead to faster oil degradation (oxidation), faster oil consumption, and potentially shorter engine life. When discussing the issue of oil consumption, we must keep in mind that there are only two ways oil is consumed in a diesel engine: Oil is either burned in the combustion chamber, or it leaks through seals or gaskets. Several factors or conditions can affect the amount of oil an engine consumes. | | | |