In 2025, the Verification of Lubricant Specifications (UK) Ltd (VLS), an independent and impartial body which investigates lubricant product complaints, announced a market-wide investigation into engine oils making claims against the Stellantis FPW 9.55535/03 specification.
The Stellantis FPW9.55535/03 5W 30 engine oil specification is mandated for a broad range of modern Stellantis vehicles, particularly those with DV5R, DW10F and DW12RU diesel engines, as well as 1.2L PureTech (EB2) petrol engines. It applies to many Peugeot, Citroën, DS, Fiat, Vauxhall, Opel, and Jeep passenger and light commercial vehicle models.
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