Shell Helix Ultra ECT C2/C3 0W30 Engine Oil Shell Helix Ultra ECT C2/C3’s fully synthetic formulation uses Shell’s most advanced emissions compatible technology to help petrol 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. Shell Helix Ultra ECT C2/C3 can be used for modern petrol engines, diesel engines with particulate filters and gas engines and is suitable for use in vehicles currently using SAE 5W-30 or 10W-30 grades, providing enhanced engine protection and fuel economy (Applicable where an API SN or ACEA C2/C3 oil is required. As the number one global lubricant supplier, Shell knows what goes into quality engine oils, transmission fluid, greases and other lubricants. With a whole range of products catering to a plethora of unique vehicle and machinery requirements including fully synthetic, semi-synthetic and mineral engine oils, Shell have you covered when it comes time to change the fluids in your car. Formulated on the back of real-world product testing in high-performance, high-stress motorsport applications and demanding stop-start traffic and street driving scenarios, Shell have come to offer a range of reliable oils and fluids which will stand up to the task of keeping your car running smoothly and reliably after each service. Shell's range doesn't just stop at engine oil, they also offer a range of gear oils, transmission fluid, motorcycle oil, 2-stroke oil, compressor oil and so much more. Next time you're servicing your car, bike, boat or other machinery, browse the Repco website with the REGO search function or head into your local Repco store and speak with one of our friendly staff about all things fluids and filters to give your car the attention it deserves.