How can the engine have a longer service life and a lower failure rate

Maintenance of the excavator is very critical in daily life, maintenance we have to choose a good oil, the quality requirements of the engine oil and diesel are relatively high, so we need to be equipped with an oil that meets the CK-4 level, why choose this type of oil? First, because it is low ash, can reduce carbon and sludge, and then can protect the catalytic converter. There is also this oxygen sensor, which can extend the maintenance period, and the second is to reduce fuel consumption