Originally written on Fox Sports  |  Last updated 9/5/14
Formula One boss Bernie Ecclestone insists the Brazilian Grand Prix will remain at Interlagos, saying he has received assurances from the mayor of Sao Paulo that long-demanded upgrades to the circuit will take place. Ecclestone, in Sakhir for the Bahrain GP, also says F1 is ''talking to quite a few countries'' about being added to the calendar. Among them are Thailand, Mexico and Turkey. Ecclestone says it is worth examining Bahrain's request to return to the season-opening slot, which returned to Australia when the Bahrain race was cancelled in 2011. Ecclestone also reaffirmed his opposition to the turbocharged 1.6-liter V6 engines from 2014, which will replace the 2.4-liter V8s. He says he's concerned the switch would prompt a ''fuel economy run.''
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