Here is the report from Blackstone for my 2009 Silverado 4x4 Crew Cab with the Max Trailer Package (13,900 miles on the truck at sample time). I changed the oil then headed out to Wyoming for a hunting trip. The set up includes an Amsoil air and oil filter and a Filtermag.
Towed a big horse trailer both ways at 70 to 75 MPH even thru the mountains along with M A N Y miles of super dusty roads.
Had 20 Antelope and Mule Deer in the trailer on the way back. Don't ask about fuel mileage
Towed a big horse trailer both ways at 70 to 75 MPH even thru the mountains along with M A N Y miles of super dusty roads.
Had 20 Antelope and Mule Deer in the trailer on the way back. Don't ask about fuel mileage