Fuel mileage

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RamKing70

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Hey y'all.. I have a 16 express with a 3" lift and have moved to 35x12 tires from the stock 33s. I had the speedo recalibrated as well. I knew I would lose some fuel mileage. I was getting about 17-19 on average but now seems like I'm down to the 16 mark and maybe lower. Has anyone else noticed this kind of drop?
 

Burstingbb

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Hey y'all.. I have a 16 express with a 3" lift and have moved to 35x12 tires from the stock 33s. I had the speedo recalibrated as well. I knew I would lose some fuel mileage. I was getting about 17-19 on average but now seems like I'm down to the 16 mark and maybe lower. Has anyone else noticed this kind of drop?

oh totally. I went from 20mpg to like 15.5
 

MidTennMtneer

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Princeton, WV
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2017
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Pentastar
Yeah. That's about right. I did 3" and kept stock height 33s, just went wider. 305/55/20.

Even with lighter P-metric tires I still went from 21/22 even 23 sometimes to 16/18.

I've got Pentastar with 3.21 rears. That's the biggest thing. Gears. If I had it to do over again I would've found a truck with 3.55.

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2012Lamarie

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Hey y'all.. I have a 16 express with a 3" lift and have moved to 35x12 tires from the stock 33s. I had the speedo recalibrated as well. I knew I would lose some fuel mileage. I was getting about 17-19 on average but now seems like I'm down to the 16 mark and maybe lower. Has anyone else noticed this kind of drop?
That's actually not a bad drop at all.

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daveray9

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I have a sport with the 3.55 gears. Put on LT KO2s in stock size and headers. Went from 16-17 to 12-13 lol. Im sure my foot doesnt help. Makes me seriously think twice before 35s tho.

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PCT

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I have a sport with the 3.55 gears. Put on LT KO2s in stock size and headers. Went from 16-17 to 12-13 lol. Im sure my foot doesnt help. Makes me seriously think twice before 35s tho.

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I had 33 on my 4.7 with 3.55. lost all my mpg

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daveray9

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I had 33 on my 4.7 with 3.55. lost all my mpg

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But it looks cool lol. Im on a 93 custom tune also. For a daily driver it kinda sux. Wondering how bad it would be jumping to 35s

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RamKing70

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I'm wondering if there is any way to adjust the tranny shift points. I have the Matco ME but have not looked into it yet. Or maybe with another tool.
 
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RamKing70

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I guess the reason that I'm asking about adjusting the shift points is that now I have a hard time getting into 8th gear with normal driving. The eco doesn't stay for all that long. Those are the reasons for the lose in mileage. There has to be a way to adjust this. Either by way of the TPS or RPMs. At least I would think so.
 

PCT

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But it looks cool lol. Im on a 93 custom tune also. For a daily driver it kinda sux. Wondering how bad it would be jumping to 35s

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Haha thanksea9c3346718c425013b7c8e4fe9e655b.jpg

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