2019 d13 or x15? What should I buy??

bro how is doing your truck? how many miles did you drive ?

 

What year was your D13?

 

How has the X15 been treating you?

 

0 Issues? No Injector's. no Derates? no new turbo or EGR? No Nox Sensors or any other. Lol I am impressed

 

D13 changes fuel maps for optimized fuel economy based on suspension load. So let’s say you are empty it’ll be a dog to save fuel, you get loaded it gets more juice.
For me it became apparent after I had my step deck loaded to 80k lbs gross and I was going thru Yakima in Washington state, than I unloaded a 10k lb partial from the upper deck in Longwiev, WA and I was still pretty much maxed out on the trailer but lot of weight came off the truck. Let me tell you, this thing couldn’t climb up a ramp to get back on interstate now being 10k lb lighter, compared to flying thru mountain pass just hours earlier with full gross. I hate that about this engine but that’s how they are.