Hey guys. have to say 2 months ago I bought a 08 LMM. Its the best truck I ever bought, but this DPF system. I dont like it. Every fill up of fuel I notice when its regin by my tack and just know there goes the mpg. Whats a good programer out there for better mpg. Right now Im getting about 16mpg city and 19-20mpg on hwy.