Heading into the Spanish Grand Prix weekend, the talk was all about Mercedes being reeled in by the rest. Instead it effortlessly bagged its fourth one-two in five races, which but for a split in a small rubber tube covering a spark plug in Australia would have been its fifth.
Looking at those one-twos more closely, one of the reasons Lewis Hamilton has beaten Nico Rosberg on all four occasions is revealed in the fuel-use graphic that appears during the race.
Hamilton seems to use less fuel than his team-mate, so how he can do that and still beat him is a bit of a head-scratcher. It would be easy simply to say he's just faster, but there's more to it than that.
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