Will Buxton warns Mercedes’ latest upgrade may be a net loss after Malaysia, with Toto Wolff suggesting up to half a second per lap gone despite revised floor and sidepods.

The package targets more load in medium and high-speed corners. Mercedes expected around three-tenths of a second gain, but Malaysia’s reality fell well short of that projection.

Qualifying offered mixed signals, with Kimi Antonelli third and George Russell seventh. Race day muddied conclusions: Antonelli finished second, while Russell retired after a power unit failure.

Speaking on Up To Speed, Buxton questions whether the deficit is track-specific or rooted in the concept. The update appears to trade straight-line speed for added downforce, compromising efficiency.

Sepang stresses aerodynamic load without neglecting drag. If the floor’s pressure distribution widened the car’s operating window but raised drag, Mercedes may simply have shifted away from the front-runners’ efficiency.

Mercedes will run old and new specifications side-by-side at the upcoming Singapore Grand Prix. That comparison should expose whether track characteristics masked potential or reveal a fundamental misstep.

The sprint format allows only one practice session, narrowing correlation work and setup time. That elevates risk, as Singapore’s challenge punishes misjudged ride heights, floor sealing, and mechanical compromises.

Expect a conservative run plan split across cars, isolating floor and sidepod effects with consistent fuel and tyre variables. Any straight-line deficit should show clearly in sector traces and traps.

Rivals Red Bull and Ferrari maintain strong baselines, increasing pressure on Mercedes to unlock upgrades quickly. Every tenth matters in a compact midfield-to-front spread this season.

Driver feedback will be central. Contrasting references from Antonelli and Russell can accelerate direction-setting, particularly through Singapore’s low-speed complexes and bumps.

The next phase is about clarity and speed of response. Singapore’s back-to-back, followed by the event build-up, should reveal whether revisions or recommitment are required.

For now, Mercedes focuses on disciplined evaluation and swift decisions to keep 2026 objectives alive, while avoiding unnecessary token spend and preserving development direction under cost-cap constraints.

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Daniel Miller

Daniel Miller reports on Formula 1 Grand Prix weekends with race-day analysis, team-radio highlights, and point-standings updates. He explains power-unit upgrades, aerodynamic developments, and driver rivalries in straightforward, SEO-friendly language for a global F1 audience.