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Wear performance of two fully formulated engine oils was evaluated using the Cummins ISB engine test. One of the oil formulations used a multifunctional DVII (Dispersant Viscosity Index Improver) component with enhanced antiwear characteristics to improve durability of engine components while the other formulation comprised of a conventional additive package. After the completion of engine-dynamometer...
Carbonaceous structure and chemical composition of diesel soot extracted from crankcase oil as well as soot taken from the exhaust have been investigated. Visible Raman spectroscopy indicated a higher degree of graphitization and smaller ionic impurities in the exhaust soot compared to crankcase soot and UV Raman indicated the presence of (CO3)2− and (PO4)3− in crankcase soot. Changes in the chemistry...
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