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Discussion Starter #1 (Edited)
*Updated, 13.97mpg and then 15.02mpg (post #15)

16.3mpg vs 14.3 mpg

In the middle of last month, Jan '07, I installed the outlaw power intake in the 5.3. I do my mileage every tank and I was getting ~15.9-16.5mpg during these cold months here in NH. I always warm the truck up and only use 4x4 in the snow. These past two tanks w/ the outlaw intake have been crap mileage. I haven't driven any differently, the mean/avg. amount of time the truck warms up or goes in 4x4 is dang near the same. The first tank was already down to about 7/8ths tank when I installed the outlaw intake, that came to be 14.82mpg. This last tank was at 14.31mpg.

Anyone else see this? I was really hopeing my mileage would go up, or at least stay the same.
 

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there could be a lot of factors, its too hard to judge with the weather being like it is and shit IMO. And I know around here, middle of january it was like 30-40 and right now its 5 at most. I really wouldnt worry about it, I'd give it a few more tanks and see how it is. But my bet is the cold weather.
 

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Computer needs time to relearn...and yeah 5* weather, so really like -15* with you at speed prolly doesn't help alot in cold weather.

Dave
 

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id go with them. lol i put on my 36's and gained MPG, explain that. came from 33" boggers and got about 1.5 mpg. im at 6 now!
 

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i put on my 36's and gained MPG, explain that.
Your speedo is incorrect, due to your larger tire diamter. This is causing your odometer to read a higher mileage than your actual mileage. You think you're getting better mileage, but you're probably getting worse.
 

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no its up by 1.5. with my tsls, i got about 195 miles on 42 gal. with it off, i get about 265 mi. its off by 1.2% speed wise, so i was told to multiply my miles by 12% and thats how much im off, so add that to the miles and wallah!
 

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HOT AIR BALLOON OWNER
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Two tanks isn't conclusive to determine much. Could be some poor fuel you've had lately.

Have you reset the PCM though? Fuel trims are off somewhat.
 

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Discussion Starter #10
Two tanks isn't conclusive to determine much. Could be some poor fuel you've had lately.

Have you reset the PCM though? Fuel trims are off somewhat.
I disconnected the battery... thinking it would reset the pcm/ecu.?
 

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HOT AIR BALLOON OWNER
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Yeah that usually resets it, or you can pull the fuse(s).

Intakes don't do much, usually more noise and a bit more pull from about 3k on up. Now if you had a larger motor, bigger cam, etc they help more
 

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16.3mpg vs 14.3 mpg

In the middle of last month, Jan '07, I installed the outlaw power intake in the 5.3. I do my mileage every tank and I was getting ~15.9-16.5mpg during these cold months here in NH. I always warm the truck up and only use 4x4 in the snow. These past two tanks w/ the outlaw intake have been crap mileage. I haven't driven any differently, the mean/avg. amount of time the truck warms up or goes in 4x4 is dang near the same. The first tank was already down to about 7/8ths tank when I installed the outlaw intake, that came to be 14.82mpg. This last tank was at 14.31mpg.

Anyone else see this? I was really hopeing my mileage would go up, or at least stay the same.
I put one on my truck, but I haven't driven it enough yet to tell if the mileage went up or down. Was your filter oiled when you got it or not?
 

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Discussion Starter #15
UPDATE!

The last two tanks were 13.97mpg and then 15.02mpg... It has been getting a little warmer, I suppose I'd attribute that to the increase in mileage.

Would anyone suggest a tune to bring the mileage back up?
 
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