I've seen those Gas Mods that go into the air intake that save gas?
Has anyone tried these?

 

are you talking about those tornado wing things or throttle body spacers????


if so they make very nice paperweights (expensive ones too) but are not good for much else

 

thats the name of them. yes. this truck loves the gas!
anything to get more miles per tank?

 

take off the lead shoes??????

honestly the best thing you can do is keep up on the maintenance, give it a tune up (plugs, wires (5.2 and 5.9 only) air filter) keep the tires aired up to the proper pressure, and drive efficiently, no speeding, no racing, no jack rabbit starts, coast up to red lights, keep OD off under 45 MPH ride behind trailer trucks on the highway (even 3 or 4 car lengths back helps immensely)

 

Those do not work on MFI motors like ours. They only work on carburetor aspirated motors because they atomize the fuel mixture better. MFI (Multi-port Fuel Injection) have injectors directly above the valve and spray directly into the cylinder when the valve opens thus the atomization is done by the sprayer not the induction. Now new models (Ford) are actually incorporating them directly inside the heads inside the cylinders! Talk about a huge engineering marvel!


Give it a good tune up (search here) and get you foot out of the throttle.....LOL

 

Yeh, I thought hey if those things worked then they would be on ever shelf in ever store. But I ws hoping. I don't jump on the gas at all, but I will try shutting the OD off in the city, never knew that.
Thanks guys.

 

haha yea the only thing that tornado thing will do is make it harder for the air to get into the engine. (more obstacles to go through.)

 

I'll look it up thanks. Did you put it in yourself.

 

I'll raise the BS flag here.

 

For what it's worth, I bought my 98 4x4 with a 318 new. After about a year, I got tired of the poor mileage. I talked to the local exhaust/hot rod guru about putting on 3 inch exhaust. I had done it on my 91 Dakota and it made it fly! We talked about many options and I left it up to him to decide after he got up in there. When I picked it up he said the stock exhaust was actually pretty free flowing and he couldn't see cutting out all that stainless pipe to be replaced with galvanized. He stuck in a 3 inch WalkerDynomax and went three inch out the end. I put a K&N filter in to replace the stock one. I did not go as far as the cold air intake. I also added an "RV" or "stage 1" chip, whatever you want to call it. The main reason I did this was that I wanted to put a shift kit in the tranny and in doing my research, I found that in this day and age, you just "chip" it. B&M doesn't, or didn't, even make a kit for it. I did this over the course of a month and drove it daily to see how much each mod made a difference. The biggest difference was when I installed the chip. It gave it a much quicker throttle response. I don't have a lead foot so I really didn't notice any other difference other than sounding really cool.
They way I look at it, if my motor is rated at 210HP and I increase it to 225HP, the only time I'm going to see it is when I would have used the 210HP up and ran out of ponies. ie-full throttle, giving it all shes got. I just don't drive that way anymore. What I did see was about a 1 1/2 mpg increase in mileage. I'm not swearing to it and it could simply be my driving habits subconsciously changed in try to get better mileage.
Be that what it may, it spends most of it's time parked now and is our tow vehicle. I have 32 inch tires on it so in checking the mileage, it will be off a little. I'm doing good to average 12 to 13, but that is pulling half the time. When I had the stock tires on it, I would average about 15 to 16 day to day going to work. That is combined highway and city. I would get 20 mpg on the console read out, on a hot day, after driving half an hour, while doing 55 mph. Go 65, you kill the mileage. go through a couple of stop lights, you kill the mileage. That 20 mpg was "real time" and didn't take into account even the fuel that was used to get up to speed.
That would be my experience with Durango and mileage. We didn't buy it for the economy.