How Mercedes’ fuel strategy gave Toto Wolff the upper hand in F1’s ‘tactical game’
· Yahoo Sports
Mercedes’ fuel supplier still hasn’t certified their e-fuel for the 2026 Formula 1 season, adding another wrinkle to ongoing engine disputes.
Throughout testing in Bahrain, Mercedes’ power unit has been a hot topic, with their new design for the 2026 season coming under heavy scrutiny from rival teams.
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Their system was reported to exceed the fuel compression ratio limit of 16:1 set for 2026, with some suggesting it could reach up to 18:1 when running at higher temperatures.
Although the FIA ruled that Mercedes’ engine is compliant until at least August 1st, new questions have now been raised over whether their e-fuel has met homologation standards.
Mercedes accused of benefiting from fuel compression controversy
One aspect of the ongoing fuel compression debate that hasn’t drawn much attention is the fact that Petronas hasn’t homologated their e-fuel for this season.
Reports from Motorsport.com now suggest that both Mercedes and Petronas may have held off on getting the e-fuel approved until they had confirmation that the power unit would be declared legal.
The delay could prove advantageous. Now that the engine has been cleared, running at an 18:1 ratio offers more power with less fuel use, which means less weight in the car since they won’t need to carry as much fuel during races.
Fred Vasseur slams FIA over handling of fuel compression dispute
Fred Vasseur hasn’t held back in his criticism of the FIA’s response to the ongoing fuel compression ratio dispute that continues to make headlines around Formula 1.
The issue was addressed again during a meeting at the Bahrain International Circuit on Wednesday, where discussions led to a vote among power unit suppliers about whether to introduce a rule change starting from August 1st.
On Monday, Vasseur called the FIA’s approach ’embarrassing,’ adding that Ferrari had put forward a method for testing fuel compression ratios months ago.
Ferrari also drew attention during the second week of testing in Bahrain by unveiling new technical upgrades, including an exhaust flap and redesigned rear wing aimed at improving energy efficiency.
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