New fuel could give Red Bull a three-tenths boost next time out in Barcelona.
That is the claim of the reigning world champions' Austrian director Dr Helmut Marko, as Red Bull pushes to close the gap to 2014's dominant team Mercedes.
But in China, both Red Bulls were actually beaten by Fernando Alonso's resurgent Ferrari, following a disappointing opening three races for the Italian team.
Marko thinks Ferrari sped up thanks to a new blend of Shell fuel.
"We are also hoping to soon get a fuel that is more efficient," Marko said earlier this week, amid reports Red Bull's current Total fuel may be damaging the mandatory fuel flow sensors.
Marko has now told Germany's Bild newspaper:...
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