There is no 9th injector on the LMM (2007.5 -2010) for the DPF.
Amsoil is not a scam but rather some people are just not able to change with the times.
It's NOT a 2007.5. It's a 2007. The 9th injector was straight into the catylatic converter. My dad's truck does not and has never run on DEF/DPF. When the truck would go into the "clean" mode, you could watch the gas mileage drop significantly. It would shoot raw diesel into the exhaust to "clean" the converter. Hence the 9th injector.
The Amsoil deal with his truck was as stated. Didn't work for him.. YMMV
Clyde
