stanbnv,
Kenworth trucks built for Mexico are built at the Ken-Mex plant in Mexicali (http://www.kenmex.com/index.html). Many vehicles are built for the Mexico market that are not required to meet US standards or run on US fuels. It is only vehicles built for the US market which must comply with US law. Interestingly enough they also build Kenworths for the US which do comply. Freightliner has several plants in Mexico as do Caterpillar and John Deere. All US carmakers have plants in Mexico which build cars for the US market but also the Mexico market and other markets around the world. Cadillac Escalades and Lincoln MK something are built in Mexico. Ford pickups and Chevy pickups are built in Mexico. Most PT Cruisers were built in Puebla. Only those built for operation in the US must comply with US regulations - whether emissions or safety. When in Mexico we see many vehicles that are not available in the US - as we saw many VW beetles for many years after they were no longer sold in the US. Renault, Puegot, Seat, and a number of others can be seen at new car dealers in Mexico - and various models from the Big Three US makers can be found in Mexico that will not be seen in the US. Many foreign makers have plants in Mexico and ship cars to the US. Many foreign makers have plants in the US too - BMW - Mercedes - Hyundai - Toyota - Honda - and all the rest all have plants in the US. The largest truck factory in the world is the Swedish Volvo plant in Virginia. US pickup trucks built for Mexico to run on Mexico fuel do not have to be built to run on US fuel.
