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ATC 250R

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  1. https://www.nytimes.com/2016/09/23/automobiles/dont-waste-money-on-premium-gas-if-your-car-is-made-for-regular.html "And at General Motors, premium gas is required only in vehicles like the Chevrolet Camaro ZL1 and the Corvette Z06, with their supercharged 6.2-liter V8 engines. Even the big Cadillac Escalade recommends, but does not require, premium fuel. In fact, more than 90 percent of the company’s products are calibrated for regular gasoline, according to Bill Studzinski, G.M.’s engineering group manager for fuels. “We have always said, ‘Don’t put more octane in your tank than the owner’s manual requires,’” he said. Ford and G.M. agreed that there was one exception: If a vehicle was used to pull a heavy load or operate in extremely dry conditions, “you might gain a little in performance” from premium, Mr. Studzinski said. “Generally, there’s not a big benefit.”
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