Shell Helix Ultra Professional AT-L 5W-30 - Premium Synthetic Engine Oil

Purpose and Specifications

Shell Helix Ultra Professional AT-L 5W-30 is a fully synthetic motor oil engineered for modern Fiat diesel engines, particularly those equipped with diesel particulate filter (DPF) technology. This oil meets the demanding Fiat 9.55535-S1 specification and ACEA C2 requirements, making it ideal for Euro 5 diesel engines that require low-ash formulations to protect exhaust after-treatment systems.

Key Performance Benefits:

• Engine Cleanliness: Advanced active cleansing technology continuously prevents dirt and sludge buildup, keeping your engine closer to factory-clean condition
• DPF Protection: Low-ash formula specifically designed to protect diesel particulate filters from clogging and premature degradation
• Cold Start Performance: 5W viscosity rating ensures reliable engine starting in temperatures as low as -48°C, with smooth oil flow in winter conditions
• Fuel Economy: Optimized formulation helps improve fuel efficiency in modern diesel engines
• Extended Service Life: Suitable for both normal and extended service intervals, reducing maintenance frequency
• Low Oil Consumption: Synthetic base stock minimizes oil burn-off during operation

When to Use / Replace?

Replacement Interval: Follow your vehicle manufacturer's service schedule, typically 15,000 to 20,000 km or 12 months, whichever comes first. Some modern Fiat diesel engines with extended service approvals may allow intervals up to 30,000 km or 24 months. Always consult your owner's manual for exact recommendations.

Operating Temperature Range: This oil performs reliably from -48°C (cold start) to 233°C (flash point), covering all normal driving conditions including city traffic, highway cruising, and heavy-load situations.

Suitable For: Modern Fiat diesel engines (Euro 5 and later) with diesel particulate filters, gasoline engines requiring ACEA C2 specification, and vehicles requiring PSA B71 2290 approval.

Storage: Store in a cool, dry place. Synthetic oils maintain stability for extended periods when properly sealed and protected from extreme temperatures.

Frequently Asked Questions

Q: Can I use this oil in my petrol engine?
A: Yes. While formulated primarily for Fiat diesel engines with DPF systems, Shell Helix Ultra Professional AT-L 5W-30 also meets ACEA C2 requirements for gasoline engines. However, always verify your vehicle's specific oil specification in the owner's manual before use.

Q: Why is this oil better for diesel particulate filters?
A: This oil uses a low-ash formulation that minimizes residue buildup in DPF systems. High-ash oils can clog filters faster, leading to expensive regeneration cycles and potential filter damage. This oil keeps your DPF cleaner and extends its lifespan.

Q: How often should I check my oil level?
A: Check oil level monthly or before long journeys. Modern synthetic oils like this one have excellent stability, but regular checks help catch leaks or unexpected consumption early. Top up if the level drops below the minimum mark on the dipstick.