Raising the base price on the Model 3, Tesla’s top-selling model after the Y, could help protect margins. But the price cuts for its more premium cars highlight the intense competition EV makers face, especially in China. To bolster its market share, the automaker led by Elon Musk has started a price war this year that has boosted deliveries but sent its industry-leading margins to a four-year low. Tesla’s much-touted FSD, whose technology has been in the crosshairs of regulators over safety concerns, will now cost $US12,000. China-first debut The new Model 3 is Tesla’s first change to its mass-market…