Experimental comparison of the effect of using both synthetic and semi-synthetic engine oil on a gasoline engine parts wear

Abstract

The development of the modern engine industry imposes increasing conditions for the quality and performance of oils due to heavy-duty and investment conditions.This research includes the laboratory and experimentally methodology used to compare the effect of using both synthetic and semi-synthetic engine oil on the wear of parts of a four-stroke gasoline internal composition engine (ICE).Two test rigs were included two engines, both with identical technical and design specifications, and operated under the same investment, ambient and climatic conditions at the same time. The first engine was equipped with synthetic oil and the other with semi-synthetic oil (SAE10W40 API: SL/CF). Both rigs were operated for up to 900 working hours (hr.) and oil intervals drain (ODI) every 100 working hr.Used oil samples were taken to analyzing the physical, chemical characteristics and metal / element wear to investigate the effect of both oils on the wear of engine parts and its technical lifetime by comparing the change in the ratios of wear metals for each of iron Fe, copper Cu and chromium Cr. The used oil analysis (UOA) results were drawn that showed the superiority of the use of synthetic oil over semi-synthetic, by decreasing the change in the percentage of wear metals over the entire operating hours of the experiment, which prolongs the technical lifetime of the engine.