How far have you driven your truck [FIMG=RIGHT]http://www.cleanmpg.com/photos/data/501/Million_mile_chevy.jpg[/FIMG]Mike Sirach - CleanMPG - May 22, 2012 General Motors and the Faces of GM celebrated a huge milestone at the Flint, MI assembly plant last Friday. On April 4th and in only six years, Hugh and Tammy Pennington have topped the one million mile mark in their 2006 Duramax powered Chevy Silverado 3500 HD 4x4. How many auto drivers can say they have driven a single vehicle the equivilent of two trips to the moon and back or 40 times around the earth? The truck wasn’t driven an average of 474 miles per day gathering groceries! The husband and wife team haul camping trailers as large as 38 feet all across the United States for delivery to dealers and customers. They tout the durability of their truck and its low cost of repairs. One item they didn’t mention was fuel economy. James Davis of CleanMPG has a 2007 2 wheel drive version of the same truck. He also praises the durability of his Duramax powered Silverado. With over 382,000 miles logged, it also has been virtually troublefree. Along with the durability, he constantly monitors the fuel mileage. He delivers campers also, but only in the Midwest region and Canada. The routes pay a fixed fee for delivery, so mpg is directly affecting the profit on the trip. Using a typical mpg of 16mpg reported on several forums for pulling a camper with a Duramax, a whopping 62,500 gallons of diesel would have been used for an out of pocket expense of $240,000 at $3.82 per gallon. A more concientious and conservative approach to pulling trailers could be used. Hypermiling could increase the mpg to as much as 22mpg. The reduced amount of fuel would be 45,454 gallons for $174,543. In six years and one million miles, this could yield $65,457 more in your pocket.