Abstract
The efficiency of using of mineral engine oil modifier to restore compression of the cylinder–piston group of internal combustion engines is investigated. According to the results of full-scale tests of four different automobiles operating in an urban environment, the effect of increasing the compression of the cylinders to 20%, compared with the original, and reducing the pressure difference between them up to four times, was determinated. The effect reached a stable value after a run of 2000–4000 km and remained until the end of the experiment (10 000 km). It was found that when implementing the recommended procedure for flushing the engine before using oil with a friction modifier (FM), complete engine failure can occur. According to preliminary data the probability of this event is 20–30%.
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