Buyers' choice
After months of speculation, Caterpillar has made it official: it will not have a heavy-duty, on-highway diesel engine for the U.S. market in 2010. Its current medium-duty truck diesels are also in question, although the company says it will partner with Navistar to develop new engines for that on-highway segment. Following that announcement in June, Cummins, the one independent truck engine maker