Synthetic calcium sulfonate detergent with high base value, product code T106D. The agent uses heavy alkyl benzene sulfonic acid as the main raw material and is produced through neutralization and overbasing reactions. This product is the main variety of metal detergents. It has excellent acid neutralization ability, good rust resistance and good high and low temperature detergency. It is widely used in various internal combustion engine oils, especially suitable for sulfur in fuels. The higher engine lubricating oil, the internal combustion engine lubricating oil modulated with it can effectively reduce the high temperature deposits on the engine components, protect the engine effectively for a long time, avoid the acid corrosion of the mechanical parts, and can extend the oil drain period.