Exactly as others have stated, engines will get better millage when running efficiently.

My best millage ever was 19.2. I got this with the TST on 2/2 standard program. Stock the truck never got above 17.5. This is empty, highway millage at 75mph (I track ever single drop of fuel, much like others have)

I towed a car loaded on a car trailer (5,000lbs combined) from Maine to Rhode island in April (not sure if it was winter fuel). Towing at 75mph I got 14.8mpg. (truck only had 2,000 miles on it, so it was pretty new)

Towing a 20foot enclosed car hauler with around 7,000lbs at 75mph through the PA mountains, I got around 14-15.2mpg.

Like others you have to look at flow rates. One guy said the bucket test. If you get better fuel burning when you mist fuel more, then yes, if you open the faucet 1/3 turn and hold it open for 1 second, you get fuel. If you open it fully, then open the hose for .75 seconds, you now have the same amount of fuel, however it's more atomized, burns more, more power. So you don't always need more fuel for more power. Almost all the chips on here modify things so that it changes "how" you get the fuel and power.

Yes most chips add more fuel to get more power, however that's what most people are after, more power, and yes your millage hurts. However you can get some good chips to help. My father has been running a EZ on his 99 cummins since 40,000 miles. I can tell you that the millage gain is right around 2mpg empty, and about .5 when towing. And yes more power while doing it. Not everybody is the same though. we do drive conservitivly, however we do get on it every now and then (this means more than half throttle) not wide open pulling a sled (would be sweet though)

TS

 

With my 05' haulin' 12,000# I get around 12. Around 20K on odometer.

So much depends on road, RPM, tire pressure, tire size, drag profile, weight, driving habits, speed, etc. I can hop in my Honda Insight and get around 55mpg - but I don't expect a whole lot from my Dodge. That is kind of like "how much feed does a draft horse go through" - it goes through what it needs.

My truck weighs in at just over 8,000# with full fuel. I figure if I can get around 16-24 MPG depending upon what sort of driving I am doing (local, on the road), and HOW I drive (keeping an eye on my RPM's and speed), coupled with my Superchip (which may only help a small amount), I'll get the best I can get with all of the variables. From all of the posts on sights like these, we should get a broad ballpark on what other people get - but with so many variables, the best thing most can do is keep their foot OUT of the pedal, keep their tires properly inflated, minimize drag, and hope for the best ! Expectin' too much in terms of fuel economy on these gen 3's is always going to leave us disappointed.

Maybe over the long haul and over many, many miles 1 or 2 added MPG will make a big difference ? Heck, the premium we all paid for a diesel VS a gas engine, with the higher prices on diesel fuel and the expensive service requirements - our pocketbooks might have been happier with a gas engine, unless we are using our trucks commercially - but I love my CTD !

 

Thanks a bunch for the info fellas