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If you’re not familiar with the history of the diesel engine, you might be wondering what year trucks were pre-emission. Back in the 1970s, emissions were created with aneroids on pumps and revised compression ratios. In 2002, the heavy-duty truck market began to experience a period of pre-emission engines. Then, in 2007, the diesel particulate …

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When do USPS trucks deliver at night? The answer is: it depends. Because of limited daylight hours and weather conditions, evening deliveries are rare. However, during holidays and other times of the year when mail delivery is delayed due to bad weather, USPS may have to make deliveries at night. While these deliveries may be …

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