It is not clear if Ferrari and Honda will deploy their performance-upgraded engines this weekend in Canada. The FIA this week has informed all the teams that the aforementioned two engine manufacturers have spent the first in-season 'tokens' of 2015 to up the speed of the respective power units. In the rear of the two works Mercedes in Canada, meanwhile, will be fresh turbo V6s, but the German giant is yet to use any of its upgrade 'tokens'. Auto Motor und Sport reports that the changes have all been made under the 'reliability' banner, meaning Mercedes still has 7 tokens up its sleeve. "We suspect our competitors may also bring new power units" to Canada, technical boss Paddy...
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