I would like to improve the fuel economy on my '04 Ram quad cab, 4x4 w/ 4.7.

I think that I am going to get a K&N Filter kit and a throttle body spacer. Any thought?

 

I installed a K&N drop-in filter and switched to Mobil 1 syn oil and I gained 1 to 1.5 mpg......[sm=icon_rock.gif]

 

I had a drop in filter on my s-10 and I noticed a 10% gain in economy. Does anyone think that the whole kit makes that much of a difference? I am not sold yet...

 

I believe they do help some, but you will get better performance from them by upgrading your exhaust as well.

 

I agree that an upgraded exhaust is the key, more air in, more air out.
all in due time.

 

I put the KN 77series on my truck and it stays solid at 19.5 -21.5 on the highway, plus gave the truck more ***** with HP!!! I can easily light up the tire now...

GETTERDONE!!!

 

Can anyone else verify dusktildawn Hemi, re 19.5-21.5 mpg? I drive quite a bit and on the past two tanks I average only 16 mpg...

 

judging by the nick dusktildawn is driving a HEMI, not a 4.7. Also talking about highway mpg, not average. I get just a bit over 20mpg highway in my hemi as well, but i average around 16-17 for highway/city.

 

I know there has been some testing done on the 4.7 at another site and at 60 mph this motor gets the best gas mileage. You can get 20 - 22 mpg steady. On the hemi you would just need to do the same thing. Try out different speeds on different trips to see where the hemi gets the best mileage.

 

Same here. Have you thought about selling your truck...or are you just one of those guys who loves trucks?



-Matt-