Wich is the most economical ,4.7 or 5.7 with MDS ? Has anyone owned a 06 QC with both engines ?

 

5.7
NO MDS

 

the most economical is the 4.7. your driving style is really what determines what milage you get. with identical driving styles you will get better milage (economy) with the 4.7. especially if you dont drive aggressively. the hemi is a nice engine and with MDS you wll get about 3 mpg more than without MDS. now if you are constantly towing more than 1000 everyday than maybe you could get better milage with a hemi. hope this helps.

 

I had 2 4.7's and now the 5.7 all without MDS and the difference in fuel consumption was minimal.

 

what exactly is a recovered interior?

 

I think that he means that he had his interior re-covered, maybe custom?!?! And I would have to agree and say that if driving styles are the same, the 4.7 would be better. But why would you want to give up the power for 1 or 2 mpg?!?!

 

I get about the same city mileage, and about 20% betterhiway mileage with my 06 with the 5.7 MDS compared to my 03 with the 4.7.

 

In the official EPA tests
on the 2006 and 2007 Rams
the 5.7 MDS is getting higher highway MPG
than the 4.7 without MDS

You can read the data yourself at:

http://www.epa.gov/otaq/tcldata.htm

but be warned when you download the files
it takes a while to figure out all the columns