New Product Launch: Qualube Qualsyn MS FS 5W-30 STL03

We are delighted to announce the latest addition to our passenger car lubricant range: Qualube Qualsyn MS FS 5W-30 STL03.

Engineered for modern petrol and diesel engines, this premium, fully synthetic motor oil has been specifically introduced to meet the stringent Stellantis FPW 9.55535/03 specification, which is now widely required for a vast number of Peugeot and Citroën vehicles.

Advanced Protection for Modern Vehicles

Designed for both passenger cars and light commercial vehicles, this new formulation is essential for engines requiring Mid SAPS (Sulphated Ash, Phosphorus, and Sulphur) technology and specific OEM approvals.

Crucially, the STL03 formulation is engineered to address critical high-performance areas, including advanced wear protection, engine cleanliness, and vital timing belt protection—making it a key choice for popular 1.5 BlueHDi and 1.2 PureTech units.

Key Product Benefits:

• Stellantis Approved: Fully meets the rigorous FPW9.55535/03 testing regime.

• Superior Engine Protection: Provides exceptional film strength and robust resistance against LSPI (Low-Speed Pre-Ignition).

• Excellent Cold Start & Flow: Outstanding low-temperature fluidity significantly reduces engine wear at start-up.

• Advanced Deposit Control: Formulated with high-performance detergents to maintain piston cleanliness and actively prevent sludge build-up.

• Oxidation Stability: High thermal stability supports extended oil life and reliable drain intervals.

• Enhanced Fuel Efficiency: Features a perfectly balanced viscosity to optimize fuel economy.

Now Available

Qualube Qualsyn MS FS 5W-30 STL03 ensures workshops and motorists can service modern Stellantis-group vehicles with absolute confidence, knowing they are using an oil tailored precisely to the manufacturer’s exact specifications.

Want to find out more or place an order? Contact our technical sales team today or speak to your local Witham Group representative.