Method of reducing abnormal combustion events

The present invention relates to a method of reducing abnormal combustion events in operation of an internal combustion engine comprising the use of a lubricating oil composition comprising/mixed from (i) a base oil, (ii) a detergent preferably providing at least 800 ppm Mg and less than 500 ppm Ca; and (iii) an abnormal combustion event inhibitor compound preferably comprising at least one phosphorus-containing compound providing greater than 0.12 mass% phosphorus; wherein: 1) the lubricating oil composition is a SAE 10W-X, SAE 5W-X, or SAE 0W-X blend wherein X is 8, 12, 16, 20, or 30; and 2) when the lubricating oil composition is combined with a 88 octane reference fuel, the combination completes at least one iteration by Sequence IX Test, ASTM D829, with 175,000 cycles per iteration. 本发明涉及减少内燃发动机运行中的异常燃烧事件的方法，其包括使用包含以下组分/由以下组分混合而得的润滑油组合物：(i)基础油，(ii)清净剂，其优选提供至少800ppm Mg和小于500ppm Ca；和(iii)异常燃烧事件抑制剂化合物，其优选包含至少一种提供大于0.12质量％磷的含磷化合物；其中：1)所述润滑油组合物是SAE 10W-X、SAE 5W-X或SAE 0W-X共混物，其中X是8、12、16、20或30；和2)当所述润滑油组合物与88辛