Shell Helix Ultra Professional AST-L 5W-30
Shell Helix Ultra Professional AST-L 5W-30 is a premium fully synthetic motor oil developed to meet the demanding lubrication requirements of modern high-performance gasoline and diesel engines. The oil is formulated using advanced synthetic base oils and carefully balanced additive technology to provide reliable engine protection, excellent engine cleanliness and consistent lubrication performance across a wide range of operating conditions. It has been specifically engineered to meet the requirements of modern turbocharged engines, particularly those used in Stellantis vehicles.
One of the key advantages of Shell Helix Ultra Professional AST-L 5W-30 is its strong protection against engine wear. Modern turbocharged engines operate under high mechanical loads and elevated temperatures, placing significant stress on internal components such as pistons, piston rings and cylinder liners. The oil forms a durable lubricating film that helps reduce metal-to-metal contact between moving parts. This protective film helps minimise wear and contributes to extended engine life while maintaining reliable lubrication performance throughout the oil drain interval.
The oil also provides excellent engine cleanliness. During engine operation, combustion by-products and degraded oil can accumulate inside the engine and lead to deposit formation. Shell Helix Ultra Professional AST-L 5W-30 is formulated with strong cleaning and dirt-carrying properties that help keep engine components clean and prevent the build-up of sludge and deposits. Maintaining clean internal engine components helps support efficient engine operation and consistent performance over time.
Another important benefit of the oil is its ability to protect modern turbocharged gasoline engines against low-speed pre-ignition (LSPI). LSPI is a potentially damaging combustion event that can occur in direct injection turbocharged engines operating at low speeds and high loads. Shell Helix Ultra Professional AST-L 5W-30 has been specifically formulated to help protect engines from LSPI events, ensuring reliable engine operation and protecting key engine components from damage.
The oil is also compatible with modern emission control systems. Its low-SAPS formulation contains reduced levels of sulphated ash, phosphorus and sulphur, helping protect gasoline particulate filters and diesel particulate filters from ash accumulation. By preventing premature filter clogging, the oil supports efficient exhaust gas flow and helps maintain the effectiveness of emission control systems.
Shell Helix Ultra Professional AST-L 5W-30 meets the requirements of the Stellantis FPW9.55535/03 specification and is also suitable for engines requiring PSA B71 2290 lubricants. These specifications confirm the oil’s suitability for use in a range of modern gasoline and diesel engines produced by manufacturers within the Stellantis group.
Physical characteristics include a kinematic viscosity of approximately 72.1 mm²/s at 40°C and 12.2 mm²/s at 100°C with a density of around 844 kg/m³ at 15°C. The oil has a flash point of approximately 249°C and a pour point of approximately –50°C, supporting reliable lubrication performance across a wide range of operating temperatures and driving conditions.
