Independent workshops are being urged to immediately audit their current engine oil inventory after a market-wide investigation by the Verification of Lubricant Specifications (VLS) forced several lubricant brands to amend, clarify, or completely withdraw claims against a critical Stellantis specification.
VLS has warned that claims against version 1 of the FPW 9.55535/03 specification are only valid until July 2026.
Workshops have only days left to ensure the lubricants they use comply with version 2, while Stellantis has yet to clarify the validity period for the newly released version 3 which was issued in March 2026.
The Stellantis FPW 9.55535/03 5W-30 engine oil specification is mandated across a massive volume of Peugeot, Citroën, DS, Fiat, Vauxhall, Opel, and Jeep passenger and light commercial models.
It applies directly to the 1.2L PureTech petrol engine and DV5R diesels, which are units notorious for wet timing belt degradation if the incorrect lubricant formulation is introduced.
The specification was designed specifically for these engines to prevent premature wear, belt degradation, and the subsequent formation of debris that can clog oil strainers and cause catastrophic engine failure.
During the extensive VLS investigation, several prominent lubricant marketers and manufacturers were challenged to provide technical evidence to support their performance claims.
As a result of the anonymous investigation process, immediate catalog and labeling changes have been made to the UK aftermarket.
Withdrawn claims
The following brands have taken action to completely withdraw their claims or pause sales:
– Smith & Allan agreed to pause sales of its Momentum C3 SWTL 5W-30 engine oil and withdraw it from their catalogue pending formal approval, as they lacked technical evidence to support the claim at that point.
– MANNOL chose to completely withdraw the specification claim for its Energy Formula PSA 5W-30 7703 when challenged about the evidence supporting it.
– Ravenol removed the FPW 9.55535/03 claim for its Ravenol SMP SAE 5W-30 lubricant directly from the marketer’s website.
Amended labels
The following brands have amended their product labels and technical data sheets to clarify they only meet the expiring version 1 standard:
– Aztec Oils amended the wording on its Torotec 5W-30 STL to clarify that the claim is only being made against version 1.
– Independent Motor Trade Factors Association agreed to amend the product labels and technical data sheet for its Ad Tec 48 5W-30 PCEO to version 1.
– Rapid Group Ltd. agreed to alter the labeling and technical documentation for its Pro + Power Ultra 5W-30 PCEO to reflect version 1 only.
– Granville Oil & Chemical Ltd. amended the product labels and technical data sheets for its Hypalube FS-ST 5W-30 PCEO to version 1 of the specification.
All of these cases will be subject to a strict six-month review by the independent body to ensure they remain in continued compliance.
VLS Chairman Darren Frogson noted that while the majority of market claims are valid, the rapid pace of change in the lubricants sector requires a robust process to protect end users.
The takeaway is an urgent reminder to verify stock specifications directly on the jug, as relying on a generic 5W-30 classification is no longer enough to protect a business from wet belt liability claims.
