well i just purchased a 2000 ecsb 4x4 5.3L 3.73 gears 3 inch body lift, 17 inch escalade rims, and 315/70/17 hummer tires.

im getting 9.2 mpg!!!!!!!!

this was all with city driving, and maybe 10-20 miles of 62 mph highway driving.

im starting to wonder if it has a 6.0L swap??

any ideas on what to do to get it up in the 15 mpg range would be appreciated.

 

actually a 6.0 swap will net a higher MPG, because the engine can move that beast easier. Do a tune up, get a TUNE (custom) that should help, Seriously though a 6.0 swap would help lol

 

tune intake and exhaust. like he said custom tune or hp tuners, really improves mpg

 

oops almost forgot... the only visible engine mod is a k&n fipk.

 

you checked the block to see what it is?

 

been looking through all my gm high tech performance mags, and i think the only place the #'s are is the drivers side rear???


correct???

 

first find out about your truck. what's in it and so on. Go to autozone or whereever your nearest parts store is and ask to have your codes checked. Any codes hiding? Is it driving like poo-poo? Are you just taking a gas receipt writing the mileage on it and then on the next one subtracting the mileage and dividing the gallons into the difference between those 2 mileage numbers?

 

ummmm ya well lets remember hes 3 inchs higher which increases drag...running escalade rims on hummer tires?.....that sounds like it weighs more then my whole truck, my opinion is ur 5.3l is moving alot of weight with ALOT of drag and ya i agree a 6.0l would help move more of that wieght through the sky....LOL my opinon? lose some weight or get a tune

 

It's not the height or the wheels. I get 11.7 mpg

 

i have a $800 mac tools obd ll scanner ill try that first.

222 miles, / 24 gallons = 9.25 mpg


im also cleaning & re-oiling my k&n tomorrow