Shell Helix Ultra ECT C3 5W-30 Fully Synthetic 1 Litre 1L. Quantity (Litres): 1 Litre. Shell Helix Ultra ECT C3’s fully synthetic formulation uses Shell’s most advanced emissions-compatible technology to help gasoline engine exhaust catalysts and keep diesel particulate filters clean and protects it from ash build-up that can block the exhaust system and lead to reduced engine performance.
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