I have the 01 Ram 1500 stock with the exception of the K&N CAI... 81,460 miles..bought it new in 2000. I live in Central California, no hills...none. With the 87 octane i got 12 MPG driving like granny, manual trans. Put the 89, same station, same driving habit received 15.5 mpg...yup 15.5 ! Now using 91 octane, removed tailgate, tools, etc... will keep you posted. Hav'nt tried highway yet. Just trying to see what is the best I can get.

 

right now I am getting about 15.4 in the city, but I also have the 2wd and a heavy lead foot...

 

That really makes no sense. 15.4 is good city mileage for a 5.2. 2WD increases fuel economy. BUT, having a lead foot would make your mileage worse.

So I don;t understand what you were trying to say here.

 

something must be extremely wrong with your engine to have 89 octane give you a 25% increase in your fuel economy.

 

well when I drive like a grandma....I could get 16-16.3 mpg....I had to help my buddy move and raced A LOT...and got about 14.6....I actually got 19.1 on the interstate at 65mph for about 200 miles or less. Needless to say...I love my 318!!

 

I agree...I'm not so sure it was just the gas. I probably could have stretched the 87 test to 13 -13.5 but its just when I filled up again. I removed the shell (120-150 lbs ??) when I did the 89 test so I'm sure that helped (I know, did not mention earlier, sorry). I probably could have done 16 or 17 on the 89 test if I stretched this one too, but I don't like walking. With the 91 test I have also removed the tailgate (50 -60 lbs ??)and some tools I carry (60-70 lbs ??). Anyway those are my numbers

 

mythbusters tried removing the tail gate and they actullay got worse gas milage because of something to do with air flow

 

Put your foot right into all the time and you should be able to get well below 10mpg.lol

 

Yeah, I saw that one too. I am doing my own test just for my sake. When I am done with the 91 test, I will go back to the 87 octane with everything still off the truck and see the difference...again...if any.

 

I just drove my 99 ram 1500 4x4 with the 5.9 home (ny) from South Carolina.I averaged 14.5 mpg on the highway.Now that I am just driving around home and to work I am lucky to get 11 mpg.
Wayne