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4.7L gas mileage...

18K views 17 replies 15 participants last post by  tiger.hunor 
#1 ·
I'm getting around 13 mpg with my 4.7. i was wondering if this is normal for this engine and what i can do to get more mpgs
 
#7 ·
For what its worth, the testing we've done with the ported 4.7 TBs I've done, all of the customers have indicated about a 1 MPG increase. Of course this requires driving appropriately, but the gains for whatever reason are there.
 
#10 ·
I get right around 14 mpg, but i have the 93 superchips tune, cai, and a very heavy right foot. I mean i can barely lift it.

I did get 47mpg once according to the evic (reset the mpg calculator rolling down a really steep hill at 50 mph and foot off the gas:D)
 
#15 ·
That must of been a very long down hill :lol:

I get right around 14 mpg, but i have the 93 superchips tune, cai, and a very heavy right foot. I mean i can barely lift it.

I did get 47mpg once according to the evic (reset the mpg calculator rolling down a really steep hill at 50 mph and foot off the gas:D)
 
#13 ·
Hello newbie here chiming in With my 4x2 Grand Cherokee Limited im getting right at 17 in town and upwards of 23-24 on the highway, I run both Lucas and Seafoam about every 7k miles through the system to stay on top of these marks. Some might say different, however the numbers dont lie 325 to 350 miles a tank. Reground Cams and home-made CAI.
 
#14 ·
cruise control is your best friend.
 
#16 ·
Yup, about the same for me even with the slightly taller/wider /more agressive tires. 12 to 14 every day driving, 19 to 20 all highway.
 
#17 ·
When I had my 2wd 3.7 with a ton of mods, if I drove extremely conservative I was able to get 19 city using real world math and before the gear swap I could see 28 highway using hypermile techniques.....

Now if I drove normally it was between 14-16 city and like 20 highway lol
 
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