X15 Performance- Working good?

Yea these motors dont like the stock filters. Been told by several places to upgrade to a davco system. I get about 12k on mine. I do oil at 25k. Yea right now I'm getting 4.3mpg with 42500 on the trailer(51.5 step) so I'm about 78k gross

 

I

Wouldnt even care. I would gladly spend the 4-5k to RIP it all out and straight pipe her.

 

But they wouldn't allow that, the no DEF motor would just be a more advanced technology to meet the standard without using DEF.

 

Right... and we cant have people getting better fuel economy, savings tens of thousands, and ONLY charge them once(when they bought the overpriced truck)..... they gotta keep the money flowing to the government.

 

Its doesnt matter that the environment sees the advantage of less fuel being used... it's all about what they can do to keep the money in govt and big business

 

That sounds low - how fast are you going, and over what terrain?

 

I was doing 64 @ 1550 in 8L through WY/MT.
Now I'm back on 90, doing 69 @ 1450 in 8H in MT

 

I'm up to 4.8 now

 

Ever tried doing 58-60 at around 1350?

 

With 40k on the bed... hahahaha no.
These x15s hate to be lugged.
About 1250 she will start fighting and throwing a fit. It would most likely throw a liner.