Shell Helix Ultra ECT C2/C3 is a fully synthetic engine oil based on advanced technology that ensures compliance with exhaust emission control systems (ECT) and effective protection of particulate filters, which translates into high engine efficiency. This oil reduces friction of internal engine components, which contributes to fuel economy. Thanks to modern technological solutions, Shell Helix Ultra ECT C2/C3 protects catalytic converters in petrol cars and particulate filters in diesel vehicles. It also acts preventively, protecting against the formation of ash, which can lead to exhaust system clogging and reduced engine efficiency. This oil is suitable for modern petrol, diesel (including those equipped with particulate filters) and gas engines.