Good maintenance, 5w-40 Rotella, stock tunes and tires, drive it normal, punch it once in a while. Country, 2 lane driving, few stops, 55-60 18-19 mpg, recent hwy trip, 550 miles, 22mpg.


John

 

Taking the max of 700 miles on 32 gallons is only 21.9 mpg, not 23 or 24. The computer is usually not very accurate. If you are getting 20 or over, then that is still a lot better than most get!

BTW - a lot of testing has shown that the CAI will not help you w/ this engine.

 

sorry to hijack....

Correct me if I'm wrong...

Doesnt the digital display on the headliner pull the fuel consumption from the volume fuel desired? then calculate from there...

Soooo what I'm concerned about is that ok, the computer desires say 2.5gph well you are putting in alot more/less given fuel density, mfg tolerances in the injectors, etc....

I have found that the display is close but its always off by least .5 mpg sometimes more.

 

my hoe is already lifted on big tires mayne

 

I have the Zoodad mod with a Ram Air Intake and cat back Magnaflow 4" exhaust and keep all fluids flushed and clean. No tuner, I like it stock and I get 15 MPG as an average (City/highway combined) here in SLC. I am pleased with that as the truck weigh's close to 9K...

 

Truck started blowing white smoke and not idle very well.
Found out I needed to have the oil cooler and EGR replaced.
I live in the mountain and it has always averaged 14.5 MPG,
Reasonably good, but I do have a light foot.
I had to drive the truck for a couple of days before the repair at
the dealer and my average MPG went to 16.1.
After the repair it now averages 13.4.
Could anyone possibly explain why?

 

Please start your own thread as this will get more responses to your specific questions. And welcome to FTE!

 

Your computers were updated to the newest flash, which in known as a mpg killer.

Josh

 

For better mileage try the right foot mod. There's a write up in the tech folder

 

To add to economy topic, West Coast is having diesel fuel diluted with environmental stuff, where California fuel gives pretty low mpg. Each time I fill up in Utah my mileage goes up good 15%.
Nevada is mostly selling CA refined fuels, but occasionally I get fuel that gives me additional 75 miles on the tank. I would guess that is Wyoming fuel.
For those in Reno area, there are gas stations in Sparks, that sell G-diesel As good as Utah fuel and for good price to match.

 

The diesel fuel isn't "diluted with environmental stuff"... Diesel in Oregon is 5% biodiesel, or B5, but the lubricity gained is well worth any minor change in BTU content (less than 1% difference).

 

I would love B5 in California, but the few stations in Sacramento area that suppose to carry it too often are out.
About 10 years ago I could find web site with fuel formulas in California. At the time gasoline at the stuff was 93% and in last years those publications are no longer available, while fuel deliver less and less mpg.
Illinois is having B20 min and that fuel cost problems on cdi engines.
You really have to do some legwork to find those information as lately they become National Security issues.

 

I'm not quite sure what you are meaning to say here. You can't compare diesel fuel to the gasoline/ethanol issue though, no comparison whatsoever.

 

Even running b99, I only loose 8% or so on the mpg's. I know winter diesel (50% #1 or kerosene) has a little less BTUs, but I don't know if that could cause a 15% decrease.

 

I see about a 2 mpg drop with winter blend here in Northern Colorado.

Josh