WOW!!! Your gas milage sucks on those 35g tanks. I'm with bwhite757.. I have the 26 Gal Tank on my 05 Hemi.. I fill up at 1/4 tank. IT ranges from 280 - 320 Miles. (the few times i get to the gas light i'm pushing 340-350 miles) I live in orlando right now and drive regular stop and go traffic... I average 15-16 MPG... City... on the highway i push upwards to 18MPG... maybe i'm just a light foot IDK... but 340 miles on a 35 GAL seems bad... even 385 is not that great. (11 MPG average).And with the newHEMI's MDS system you should be killing me even if only by 1 or 2 MPG....All i can figure is the extra weight gives you less MPG when full...
ON average...[*]1 gallon of water equals 8.33 lbs.[*]1 gallon of gasoline equals 5.8 to 6.5 lbs.

You have 10 extra gallons of gas is 58 - 65LBS... not much but maybe it could make a difference...

 

sddunn2


how big were the tanks?


my brothers ford has 2 tanks that hold a combined amount of 30 gallons.

my old chevy 3/4 hvy had 1 32 gal.

my old dodge ctd (that I now drive ) has 1 24 gal



1 or 2 tanks wont make the diff on fuel milage guys.

use your brains!!!


its the driver, vehicle weight, drag (empty or loaded), computer settings, etc.

my 93 ctd gets 400miles + on 1 24 gallon tank.


try a smarty or another programmer and see if you can dial in the best mpg out there..

 

It's a 34 gal tank - I don't have mds - and my truck weighs in at almost 6700lbswith 3.73 gears - I don't have a lead foot - I drive it pretty easy - but with the gearing, bigger tires that I am running and the weight of the truck - it's not going to get good mpg - but on the hwy I can get 14-15 at 75 - and 15.5-16.5 at 65. I only have to fill up once a week (every sunday) so it's not to bad. But if I could have a second 34 gallon tank - I probably would - it would be nice to only have to fill up every 2 weeks.

 

aluminum diamond plate for the bed would be the better choice for a 2nd tank.

 

Those are the big tanks that alot of diesels have right - I thought those weren't DOT approved for gassers? If they are - do they just work as a second tank flowing through the same lines as the underside gas tank?

 

As I noted the 385 miles was the first 385 miles. I anticipate the milage will improve with break in.

 

yeah my friend just bout a 94 ford and its got 2 tanks.....only uses the front one though, i think he said they are both 19 gallons.....

 

I am glad to only have one tank now. its the same capacity as my truck with two, with 1 less fuel pump and filter to go bad

 

Ya I dont remember how big the tanks were .. It was just a thought .I have never figured out my mpg but I dont think it is very good maybe 500km on a tank could be more ??? I will have to check it out . I do know that I have the big tank though.

 

I always get over 500 miles in my '06 1500 Mega with 36 gal tank, even if its mostly city driving. My '96 5.9 on the other hand, maybe 250 miles and I think it's a 26 gal.