Toyota Motor Corp.'s Camry that meets Partial Zero Emissions Vehicle emissions warranted for 15 years /150,000 miles has a 4-cyl. engine because it produces inherently less emissions and needs fewer emissions-control devices than engines with more cylinders, says a company spokesman. This in effect throws down the challenge to motorists who live in urban areas and want better air quality: despite the fact they prefer larger, higher-horsepower engines, that choice is not the best route to ...

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