2015 Peterbilt day cab 579 mx-13 505 Factory horsepower 13 speed manual long wheelbase locking differential drum brakes aluminum wheels rear tires are almost new front tires for about 85% sliding fifth wheel 52,000 GVW clutch and brakes are good drives nice the mx-13 gets better fuel economy than any engine out there power steering AC heat power windows power locks as controls for all the electronics on the steering wheel single air ride seat 226 in wheelbase $699,000 MI truck has been highly maintenance by doonan Peterbilt out of Wichita has no blow by and runs super good Fast Lane Auto Scott City 620-874-5109 drove the truck back from Wichita without a trailer got 11 miles per gallon