Why be concerned with engines that burn oil?
The excessive burning of oil contributes to the engine’s particulate matter (PM) emissions reducing the service time between regenerations in DPF systems that must be manually regenerated (active DPF system). Generally, the capacity (and thus the running time between regenerations) of active DPFs are sized for the PM emissions rate for a specific engine model in good working condition. The lubricating oil also contains metals which create an ash residue in the DPF that is not removed by simple thermal regeneration. Thus ash accumulates much faster than it should, increasing the back pressure of a fully regenerated DPF, shortening the service life between regenerations in active DPFs, and requiring more frequent maintenance to remove the ash for both active and passive DPF systems. [ CLOSE ] Why must the exhaust CO concentration be at an acceptable level? The carbon monoxide concentration in the raw exhaust is a good indicator of engine condition and/or engine tune. Higher than normal C
