Castrol Magnatec FE 0W-20 Oil Specifications

Viscosity

0W-20

ACEA / API

ACEA C5

Fuel Type

Gasoline & Diesel

Availability

Global

Magnatec FE 0W-20 uses Castrol’s Intelligent Molecule technology, which clings to critical engine surfaces such as the valvetrain and pistons to reduce wear during cold starts — Castrol states that roughly 75% of engine wear happens at the start of a journey. Built to ACEA C5 and PSA’s B71 2010 approval, it targets Stellantis-group low-viscosity applications, with a stated fit against Fiat’s 9.55535-DM1 requirement as a separate, lighter claim.

OEM specifications and approvals

Officially approved

The manufacturer's own product documentation states these as licensed, tested approvals — not a general recommendation.

PSA B71 2010

Meets / recommended for

These specifications are listed by the manufacturer as met or recommended, which is a lighter claim than a formal, numbered approval.

Fiat 9.55535-DM1

Is this oil compatible with your car?

Viscosity alone does not determine whether an oil is right for your engine. Compatibility depends on the exact OEM approval your manufacturer requires, your engine's build, the model year, and the market the car was sold in — the same nominal viscosity can carry different approvals in different regions. Check your owner's manual or use OilFinderPro below to confirm the requirement for your specific vehicle before buying.

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Disclaimer: Specifications on this page are drawn from the manufacturer's own published product documentation as of the verification date above and may change. Always confirm the current approval and viscosity requirement for your exact vehicle in its owner's manual before buying oil.