Lubricant formulations with silicon-containing compounds

A lubricating oil composition formulated for use in a turbocharged gasoline direct-injection engine comprising:

• greater than 50 wt. % of a base oil of lubricating viscosity, based on a total weight of the lubricating oil composition, and an additive composition prepared by mixing:
• a) an amount of one or more overbased calcium sulfonate detergents to provide at least 1200 ppmw to about 2400 ppmw of calcium to the lubricating oil composition, based on the total weight of the lubricating oil composition, and
• b) an amount of one or more silicon-containing compound(s) of formula (IA) to provide at least 170 ppmw to about 550 ppmw of silicon to the lubricating oil composition, based on the total weight of the lubricating oil composition:
• wherein R1, R2, R3, are each independently selected from an alkyl group comprising from 1 to 20 carbon atoms, and m is an integer from 1 to less than 50;
• and
• wherein a ratio of ppmw of silicon provided by the one or more silicon-containing compound(s) to the lubricating oil composition to the ppmw of calcium provided by the one or more calcium-containing detergent(s) to the lubricating oil composition is at least 0.0389 to 0.1;
• and
• the lubricating oil composition is devoid of a calcium salicylate detergent.