2015 6.7 mpg?
 

Hello. I was wondering what kind of fuel milage you 6.7 owners get? Preferably a 2015( 2nd gen 6.7 ) if possable. Thank you.

Getting 16-17 around town, upwards of 23 highway unloaded. Keep that boost under 10 psi and mpg is great. Could t believe it when I test drove truck as my 13 Eco couldn't touch those numbers. I hot rod a bit also but taking it easy cruising diesel has so much torque that keeping it under 10 psi you still are cruising pretty good.
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nice, and is it true that idling is bad for these motors? i have heard it is.

I think it's ok I idle mine but was told by a friend that a salesman left one idling when clearing snow by accident for I believe it was like 6 hours and it messed up the dpf system. That's was in a 14 so that's extreme but who knows. I run in and out of stores and what not and just leave it.

I have a 2014 I get maybe 15 mpg city but I drive like an idiot and race cars at red lights etc. On highway I get 18mpg, the mpg difference between a 2014 to 2015 is nothing because the horsepower increases and torque is from a slightly larger turbo and bit better piping. Best way to increase mpg is a tuner.

When I had mine connected I was getting 17.5 city and the power increase is unbelievable, only reason I took it off is because I am trading it in and I would rather sell the tuner on ebay than give it to the dealer haha.

What tuner did you have?

stupid question.. What does dpf stand for?

Diesel particulation filter

The tuner I have is the edge evolution CTS,


Idling long times with the engine not under load, people claim it can cause a situation called wet stacking which is build up of unburned fuel clogging up the system. I know many people that idle their trucks all the time and over night in really cold climates and have not had the problem. I feel its more of a mental fear than the reality of its occurring. I also understood that its more prone to happen on stand by generators that rarely get solid run cycles in and only do so in rare occasions like power outages etc.

I would stay for someones diesel truck you have no issues with idling since the truck will get put under a load at some point soon after the idle period.

As far as the diesel particle filter it collects more carbon when the engine is under heavy load but at the same token the running temp on the system is higher during those periods so the carbon is burned off passively. In idling if by some chance you built up enough carbon to get the filter to 100% load the active regen cycle would kick in and raise rpm's and the temp in the filter to burn off the carbon.

I had a 2014 F350 CCLB 4x4 with the 3.55 gear and put just over 20k on it last year. Tires were factory 20" Platinums with the factory tires. Most of my fill ups were 17-17.5 mpgs(75%hwy/25%city). I saw 15-16 when I was less highway, and as much as 18.5. These are hand calculated numbers when I filled up the tank(not partial tank mpgs). If I was making long easy drives I often tried for 20 but never quite got it. I have no city only mpg numbers.