Penrite Semi Synthetic 15W-40 is a premium quality friction modified engine oil, formulated using the latest engine oil technology and high performance additives including a FULL ZINC anti-wear package for complete engine protection. Suitable for use in a range of modern naturally aspirated, supercharged and turbocharged petrol and light-duty diesel engines, it is API registered and recommended for applications where API SN/CF and ACEA A3/B4 or earlier specifications are required. Penrite Semi Synthetic 15W-40 exhibits exceptional cleaning characteristics, and is designed to reduce harmful engine and piston deposits as well as sludge formation to keep your motor running smoothly and safely across the service life. Sheer stabilising viscosity-index improvers prevent the breakdown of molecules under intense pressure and friction, helping to avoid thermal breakdown and losses in oil viscosity (oil thinning). To find the oil type and viscosity suggested for your vehicle; either add your vehicle to My Garage or check with your manufacturer, vehicle user manual, your local mechanic or head in-store and talk to one of our friendly team.