Posts: 118
Location: Minnesota | Guest, the 2008-2010 5.3 with AFM had some issues with oil consumption due to piston and ring choices GM made. I own a 2011 with the 5.3 - 6 speed and using tow haul mode the truck stays in 5th gear at highway speeds. I have found in most cases I am averaging 14.5 mpg and oil consumption is about a 1/2 quart for every 3000-3500 miles. Pretty normal if you ask me. My boat is only an 18' bass style boat, so it may differ if the boat is much larger. The only thing I don't like about my truck is the LTZ package with the 3.08 gears. If I was going to buy another truck today, I would buy the 6.2 ltr. with the 3.73 gears, the 6 speed will improve the gas milage enough. |
