A lubricant composition includes a hydraulic fracturing treatment fluid and 0.5 to 20 wt. % of carbon particles. A method of fracturing a formation includes introducing a hydraulic fracturing treatment fluid into the formation to induce fractures, where the hydraulic fracturing treatment fluid includes carbon particles present in a range of 0.5 to 20 wt. % of the total hydraulic fracturing treatment fluid weight.

Lubricating oil compositions are disclosed that are suitable for use in all engine types and that provide a reduced Average Friction/Traction coefficient in use, with attendant improvement in fuel economy performance, especially retained fuel economy performance. The disclosed compositions are also advantageous in that molybdenum-based friction modifying ingredients previously considered crucial to reducing friction from metal-metal contact and high molecular weight PIBSA-PAM dispersants can be omitted or used at lower treat rates without impairing friction-reducing or fuel economy performance.