Gas Mileage Help

[White96k2500]

Okay so i have a 96 k2500 all stock except its on its third motor (second with me one before i bought) and got some different wheels the previous owner put on but still has stock tire size and no lift but i struggle to get anything better than 12mpg and i need some recommendations on how to get better mpg so any input will be greatly appreciated!!

 

[Supercharged111]

Check your fuel pressure, you may have a plugged filter. The stock poppets may be junk too. You're not going to see much north of 12, I can tell you that much. My mpg was down 1 to a plugged filter years ago.

 

[letitsnow]

454 or 350?

My k2500 with a 350 gets 15 in the summer if it isn't windy and I drive nicely. 12-13 is more realistic.

Moving a brick through the air with heavy running gear is expensive.

 

[White96k2500]

454 or 350?

My k2500 with a 350 gets 15 in the summer if it isn't windy and I drive nicely. 12-13 is more realistic.

Moving a brick through the air with heavy running gear is expensive.

350 and i know what you mean i wish this thing got better mileage and i have never got past 14 mpg in it but it’s been forever sense ive even saw 13 mostly getting 11-12 right now

 

[White96k2500]

Check your fuel pressure, you may have a plugged filter. The stock poppets may be junk too. You're not going to see much north of 12, I can tell you that much. My mpg was down 1 to a plugged filter years ago.

I need to check my filter then, I noticed i while ago that my truck would just studder a month or two ago when i was driving it would just seem like all power was lost then come right back then after I’d get on it, it would stop i kinda figured that’s what it was because in my friends jeep grand chreokee his filter was plugged up and every time he would turn it would die for a second then come back on

 

[Supercharged111]

To be clear, slow hwy mpg for me has hit 14-15, but hwy only miles are rare for me.

 

[White96k2500]

To be clear, slow hwy mpg for me has hit 14-15, but hwy only miles are rare for me.

I never really drive on the highway unless family is in the hospital occasionally i will drive to the big city but like you said just highway miles never happen for me I mainly just drive to school and into town and that’s about it

 

[evilunclegrimace]

the 4.10 gears and 4L80E in your truck are going to keep the mileage down a bit.
My '98 suburban with a 5.7 and 4L06E gets 16+ MPG in town and 18MPG on the highway

 

[White96k2500]

the 4.10 gears and 4L80E in your truck are going to keep the mileage down a bit.
My '98 suburban with a 5.7 and 4L06E gets 16+ MPG in town and 18MPG on the highway

I wish i could get that kind of mileage it’s rough getting 11-12 mpg going to school

 

[Supercharged111]

the 4.10 gears and 4L80E in your truck are going to keep the mileage down a bit.
My '98 suburban with a 5.7 and 4L06E gets 16+ MPG in town and 18MPG on the highway

I didn't notice a change in economy when I went from 3.73 to 4.10 or when I swapped my 4L60 for a 4L80. Or when I put the blower on. It seems to get what it gets.