I looked through the graphs - some are in English, and the abstract is in English. I don't think this is a study on the affects of dilution on an engine, but a study on how to measure dilution, its affect on oil consumption (maybe??) and some other ancillary analysis, like how to calculate oil consumption in diluted fuel. I saw no charts representing engine wear or anything related to it, nor is it mentioned in the abstract?
The abstract:
Annotation. Annotation. Annotation. Turbocharged gasoline engines with direct injection (DI) fuels are widely used in cars in almost all classes. However, as practice has shown, DI have an increased risk of excess fuel accumulation in engine oil, which in turn can lead to a significant reduction in engine reliability and durability. The study of this problem and the search for technical solutions to reduce the risk of oil dilution with fuel is an actual task. The purpose of the research is to study and identify the causes, conditions for fuel to enter the oil and to determine the patterns of changes in the concentration of fuel (%Fuel) in the oil depending on the load, speed modes and external operating conditions of the SI in the vehicle. The work used both standard methods of bench and laboratory road tests, as well as special methods for determining %Fuel. The experience of applying a new simple and reliable method for determining %Fuel is presented. Regularities of fuel accumulation in oil depending on engine temperature speed and load conditions are obtained. A physical model of the interaction of fuel and oil under the conditions of a running engine is proposed. It is shown what happens to the fuel in the oil during operation under various conditions and what is the effectiveness of methods to reduce %Fuel. The developed method for determining %Fuel, in addition to solving problems of analyzing engine oil, made it possible to refine the gravimetric method for measuring oil consumption by introducing a correction for %Fuel, which significantly increases the reliability of determining oil consumption both during bench tests and in operation.