Abstract: With the tightening of current energy-saving and emission regulations, the energy-saving of engine oil has attracted more and more attention by automobile manufacturers. GF-6 gasoline engine oil specifications put forward higher requirements for energy saving, and it is not widely representative to use a bench to evaluate the energy saving performance of lubricating oil used for various engines. Therefore, a set of evaluation methods that can accurately evaluate the energy saving of gasoline engine oil was established for a certain type of 4-cylinder engine, and bench tests were carried out, and the results of friction performance of different oil formulations were compared with those of SRV simulation tests. It is concluded that the established bench test method has good distinctiveness and repeatability, and is suitable for evaluating the fuel economy of low viscosity gasoline engine oil.

Key words: gasoline engine oil, fuel economy, friction performance, bench test, distinctiveness