Jaguar have revealed they have given Mark Webber a more powerful engine to use in Sunday's US Grand Prix. Webber has scored all Jaguar's points so far this season but they lie ninth in the 10-team championship.
"We've got an upgrade that we're trying with Mark, we've just built one engine and will see how it goes," said team principal Tony Purnell.
"There's always a risk when you try an engine for a first time but we need to pull something out of the bag."
He added: "We're thoroughly disappointed with the season, We started with a very nice quick car and we've been let down by a lot of small mistakes.
"But in Formula One you've got to be good at everything and the areas that we haven't been so strong on have hurt us very badly."
MMIX
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