Millers Oils CSS (Competition Semi Synthetic) Nanodrive is an engine oil developed for Motorsport use. The use of Nanodrive technology hugely reduces friction, compared with traditional semi-synthetic oils, resulting in improved engine power, reduced engine wear and improved engine efficiency. The 20W60 viscosity is designed to protect competition engines running at very high temperatures. This higher viscosity grade also enhances performance for endurance events and is ideal for older competition engines.Reduces friction by up to 26% compared to a standard engine oilSuitable for modern high performance enginesExcellent thermal stability and oxidation resistance.Semi-synthetic base fluid provides maximum engine protection with minimum power lossAll the engine oils in the CSS range are formulated with a high performance ester formulation combined with latest NanoDrive additive technology for maximum performance at an affordable price.'What is NanoDrive Technology. 'NanoDrive technology