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Message: [QUOTE="Highbeam, post: 164832, member: 23735"] I would have been worried with the 13 that something was wrong. Maybe your brakes were sticking/dragging. Does it coast faster or further now? 20 mpg is very reasonable with that engine and truck in Idaho so now you're about right. Keep an eye on your brake linings for excessive wear. On the off chance it was running very rich or not combusting completely you would get a lot of contaminants in your oil so it may be a good idea to change the oil and filter. Do you have to go up the steep hill towards washington every day? that may give you crappier mileage but not 13. [/QUOTE]