Lista zgłoszonych artykułów

The article presents the impact of engine oil operating conditions, determined by the change in engine oil viscosity depending on the mileage of a passenger car. Without proper lubrication, an engine very quickly fails or even is destroyed. Therefore, for many years, oil companies have been working on developing engine oil technology that will protect the engine from wear so that it can withstand hundreds of thousands of kilometers of mileage and years of operation. This will be possible if the oil fulfills the tasks assigned to it. The research described in the paper concerned LongLife type oils, with a change interval every 30 thousand km. This type of oil was selected due to its common use in modern combustion engines; synthetic oils are increasingly used due to their quality and positive effect on reducing fuel consumption. The issues discussed in the paper concern primarily the variability of viscosity depending on various factors. In addition, the types, properties and additives of engine oils were presented quite broadly in order to examine their relationship with oil viscosity. Thanks to this, the obtained results can be considered in a broad aspect. Based on the conducted tests, the optimal mileage for LongLife oils used in ZS and SI engines was determined to an approximate extent. This mileage is indicative, because the oil samples came from engines of cars of the same make, serviced in authorized service centers, but used by different drivers