What's your intake set up now? You don't have to drive till empty but you do need to start and end full. I would go at least 1/4 tank. Note your mileage or reset your trip meter then refill after driving, divide your miles by the gal it took to refill

 

It's noted in OP but its the stock tube with PVC adaptor to take a k&n cone filter and then I also cut the air box cover hole so it would fit the k&n and keep it away from the heat.

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I also have a p pump intake horn will that help or is there no difference

 

If you also increase the piping size it will help but the 12 valve p pump horn isn't a big improvement on its own. The 24 valve is much better. K&N filters are not vary good when used with Turbo or supercharged engines. Also the pleats in the factory tubing causes turbulence and the factory housing has a vary small intake opening

 

OK, been sitting here on the fence, listening. You want better fuel mileage , right?
OK, do the regular things, (here we go again)...
1. Air up your tires
2. Lower your wind resistance
3. Do a diesel tuneup, so your motor is at peak operating effeciency.

Note- your not gonna get good mileage, even if you got 40hp sticks with a stock pump. Put your stockers back in. If over 125,000 miles, have your stockers cleaned and tested. Put your pump back the way it was.
OR, at least have it turned up mildly....

4. Run a 16cm turbohousing....
5. Run those black coated rims with the most handholes in them (they're lighter than stock), or aluminum rims (less mass to spin and slow down while braking)
6. Control your foot...don't try to beat the Duramax next to you at the redlight, or that Honda Civic....
7. Install a DIY Propane system on your truck....I usually get a avg. of 5-7 mpg increase, because I do all the above first. My own personal truck got 8 more MPG's after install, thats with the initial cost of the system, including the tank-$150-$200. Alot of MPG for the money spent.
The way my system is tuned, my truck has more pep than a stocker, so its easier to mash down on the go pedal....

http://www.ehow.com/way_5941780_do-y...injection.html
http://www.ehow.com/facts_7532787_pr...l-economy.html

 

The one thing bad about the propane is that when your engine blows its scrap not re-buildable.
other than that drive conservative
keep it tuned up
clean air filter
clean file filter
tires aired up to or slightly above recommended.
any extra weight that is not necessary that you could lose would help.
8-10-12 ply tires increase milage and load maximums but create a harder ride.
cut off the catilitic converter on the exhaust unless you live ware they do emissions testing. good luck
1918-207-5275

 

thatnks that realy helps alot. how will yoou know if you put too much in. also do you think its safe on a 300+k mile engine

 

Well, your trying to get mileage, so have it turned down to about .5 to 1 psi. All your wanting to do is burn all the diesel in your cylinders that your not burning now. That will add horsepower and pep, and you won't have to push your accelerator down as far to do the same work. Its a great product for getting good fuel mileage. Just read up on it....theres a really good writeup here by one of the old hands. I've been around propane injection all my life, from the old farmers that used to run it on their tractors 40 years ago...to the forklifts and trucks that ran it. Also adds performance too, if thats what you want to tune it to. I use mine for fuel mileage, adds pep and power....I can tell its got more....but I'm easy on the go pedal. That is, until I climb behind the wheel of my hotrod cummins.... Yes, its safe for a high mileage engine unless your really dumping alot of gas in there....

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Here ya go..... https://www.dieselbombers.com/sale/1...umigation.html

 

I just txted him no txt yet. Do you think I should run a regular BBQ propane tank? or should I get a automotive tank? what is the diference if I run gas or liquid? thank for the help Im 99% sure there will be a propane setup on my truck by next weekend

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I just seen that was posted in november so he might not have it any more. I just called a few rv stores and they dont have any adjustable lp regulators. any ideas who I should call

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ok so I found the stuff and the guy helping me was a freind of a freind and he hooked me up for $100 buck out the door I got a regulator with a gauge, a solenoid valve and all the brass fittings, all I need to do is get a switch. also I have a small 10lb bottle I can run inside my tool box

 

You should get a D.O.T. approved tank. Also, mount it in the bed or under the bed, make sure that the tank has a gauge as you will get a better price per gallon.

 

They are just to big I think those tanks are meant for gas trucks running on propane. From what I've read you don't use a lot of propane when running 1psi and I'm pretty sure a 10lb tank will last about 3000 miles. I'm going to set this up and make improvements as I go