 We'll talk about that. I'll also take your calls coming up next. 866-90-RED-EYE is the phone number. 866-907-3339. Got a lot more straight ahead. This is Red Eye Radio. Brought to you by FPPF, Fuel Power Max. Just because idling is common doesn't make it smart. Idling a diesel uses about a gallon of fuel per hour, which can cost you about $180 per week at $450 per gallon if your truck idles eight hours a day.