Evaluation of New Antiwear Chemistry in the Sequence IVA by Radionuclide Testing

抄録

Pressures for improved emissions system performance and increased fuel economy are driving modern engine oil formulations to lower levels of ZDP and lighter viscosity grades. Both trends could lead to increased wear. Therefore, a test was sought to provide precise quantification of the wear performance of modern oils with low levels of ZDP under realistic conditions. The Sequence IVA engine platform (Nissan KA24E) was used in combination with a radionuclide labeling technique called surface layer activation. The work demonstrated how ZDP level and other formulating variables affected wear and identified several highly efficacious new antiwear components.