First Drive: New '07 Chevy And GMC Diesels
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Exhaust gases are recirculated from the exhaust manifold into an EGR cooler that feeds fumes back into the intake with help from the new electronic air throttle. The EGR system and the diesel particulate filter require the use of new, low-ash, CJ-4-compliant engine oil so they don't become clogged. View Related Article
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Mercedes GL Research
Being one of the most popular cars in its class, the Mercedes GL offers good performance and quality. The V8 standard engine in the GL gives you 382 horsepower with an estimated 14 mpg. It also comes with comparable safety features. Other similar vehicles are the Volkswagen Touareg and the Jeep Grand Cherokee.
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