The Buick Encore is a serious bright spot on the GM sales roster right now, partly because even the company didn't expect it to be selling as well as it is, with about 23,000 of them going to new homes since this spring. In fact, it's contributed so much to the continued upswing at Buick that the company is interested in exploring a more powerful engine for the tiny crossover and, wait for it, a diesel Buick of some kind.
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