Originally Posted by ramit355
Nice Job but I'm confused with your data
If your Ram has a "tank full" @ 23 Gallon to fill Tank it would like this:
4 tanks MDS 4 tanks defeated=8
14000 mile Test range for 8 tanks = 23 gallons x 8 Full tanks=184
14000 miles Divided by 184 gallons=76.08 MPG
Same formula above using an 18 gallon Tank = 97.2 MPG
LoL.....I think its a no brainer to run with MDS off!!!!!
I've burnt a few more than 8 tanks of fuel....a lot more!
But for control reasons, I based my calculations on 8 tanks where I carefully logged all pertinent information to ensure my test results were not skewed by external factors like tail wind for first 4 and head wind for 2nd 4, or +30deg for first 4 and -30deg for 2nd 4....you get the picture.
My driving style is very consistent....aggressive...respectful, but aggressive. The weather conditions are...well...it's the weather...what can I say. All I wanted to do was ensure that I was making an informed decision on whether or not to disable the MDS permanently.
Since installing the DSP with a 91 tune and upgrading my air filter, I have noted a MPG increase of 2.1 city...all the while driving more aggressive than usual. I then added a MagnaFlo exhaust, and .... well, I like the sound under heavy acceleration..
2 Tanks since then, and have averaged an additional .6 mpg.
To recap -
Previous MPG (city) - 14.4
Drive more aggressive and a lot more WOT
Current mileage (city) - 17.6 (as of today, 38 gal average)
It appears that although I am driving in a less fuel efficient fashion, I have somehow managed to increase my city mileage by 3.2mpg. The bonus - I have some extra HP to play with, it runs better, sounds better and is more enjoyable to drive.
Down side - I have an Oil change appointment tomorrow, so removed the tune tonight so I don't forget. My dealer 'may' connect to it if there is a TSB or RR that's available, and I don't want to take the change and have my tune over-written. It's a minor hassle to have to remember to do this, but the benefits far out weight this inconvenience.