Improving gas milage on a 5.3 tahoe/suburan
#1
Improving gas milage on a 5.3 tahoe/suburan
Im looking into getting a 00+ 5.3 4x4 tahoe or suburban here pretty soon. But i want to improve on the gas milage as much as possible. Right now i have a 99 4.0 jeep cherokee 4x4 and get 17mpg on a GOOD day usualy around 16.5 or so. If i get a new vehicle i dont want to go down.
So my question here is what are the things i can do to improve the gas milage besides keeping off the gas ? How much more can i get from a k&n FIPK, cat back exhaust (maybe new cats?), TB, TB spacer?, pcm tune?
So my question here is what are the things i can do to improve the gas milage besides keeping off the gas ? How much more can i get from a k&n FIPK, cat back exhaust (maybe new cats?), TB, TB spacer?, pcm tune?
#2
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A cat-back system will get your biggest improvement. The intake,MAF, and throttle body mods put together won't make as much difference as just the cat-back. Also, the factory cats flow surprisingly well. At 120kmiles I replaced mine with high flow units and couldn't tell any difference. I'm not sure how much you will get from tuning, because I haven't tried to optimize an 87 octane tune. I'm sure if your worried about mileage you don't want to have to pay extra for premium fuel.
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it's a V8, you won't get good gas mileage. I get bad mileage with my 4.8, but I do kinda have a leadfoot from what I've heard I'd stay away from throttle body spacers.
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Originally Posted by 01Blue4.8
it's a V8, you won't get good gas mileage.
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Originally Posted by needcash
Im looking into getting a 00+ 5.3 4x4 tahoe or suburban here pretty soon. But i want to improve on the gas milage as much as possible. Right now i have a 99 4.0 jeep cherokee 4x4 and get 17mpg on a GOOD day usualy around 16.5 or so. If i get a new vehicle i dont want to go down.
So my question here is what are the things i can do to improve the gas milage besides keeping off the gas ? How much more can i get from a k&n FIPK, cat back exhaust (maybe new cats?), TB, TB spacer?, pcm tune?
So my question here is what are the things i can do to improve the gas milage besides keeping off the gas ? How much more can i get from a k&n FIPK, cat back exhaust (maybe new cats?), TB, TB spacer?, pcm tune?
My wife went from a 2000 Jeep Cherokee to a 2004 Tahoe, and was also
worried about MPG. She is very happy with her new ride, and impressed with
the MPG. You will never look back at the Cherokee.
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#9
87 oct tune (Nelson) = .5 to 1 mpg increase
93 oct tune = 1 to 2 mpg increase
Air intake = 1 to 1.5 mpg
Cat-Back = .5 to 1 mpg
Electric fans = 1 to 2 mpg
Synthetic engine oil and sythetic trans fluid = .5 to 1 mpg
2-4 psi higher than recommended tire pressure .5 to .75 mpg
Lower rolling resistance tires such as a narrower tire and/or a street tread tire instead of an mud/snow tire == 1 to 2 mpg
VR velocity stack = 1 to 1.5 mpg (this is a what someone just reported on their Yukon) https://ls1tech.com/forums/showthread.php?t=216214
MPG results of my recent fishing trip.
Kearny to Cape May, NJ , 170mls each way.
Road used GSP
Cruise control at 68-69 MPH, A/C on.
200 lbs of Tuna (bluefin) in the bed on the way back
Truck:
2000 Sierra 5.3l 4x4 ECSB
275/60 R20 michelin LTX M/S (mud/snow tires) (33" overall diam) @ 35 PSI
Uncovered bed with gate closed
Mods:
87 Nelson Tune w/All TM removed
Amsoil synthetic engine oil and trans fluid
LT1 electric fans
MPG AVG == 17.46
=Dave
93 oct tune = 1 to 2 mpg increase
Air intake = 1 to 1.5 mpg
Cat-Back = .5 to 1 mpg
Electric fans = 1 to 2 mpg
Synthetic engine oil and sythetic trans fluid = .5 to 1 mpg
2-4 psi higher than recommended tire pressure .5 to .75 mpg
Lower rolling resistance tires such as a narrower tire and/or a street tread tire instead of an mud/snow tire == 1 to 2 mpg
VR velocity stack = 1 to 1.5 mpg (this is a what someone just reported on their Yukon) https://ls1tech.com/forums/showthread.php?t=216214
MPG results of my recent fishing trip.
Kearny to Cape May, NJ , 170mls each way.
Road used GSP
Cruise control at 68-69 MPH, A/C on.
200 lbs of Tuna (bluefin) in the bed on the way back
Truck:
2000 Sierra 5.3l 4x4 ECSB
275/60 R20 michelin LTX M/S (mud/snow tires) (33" overall diam) @ 35 PSI
Uncovered bed with gate closed
Mods:
87 Nelson Tune w/All TM removed
Amsoil synthetic engine oil and trans fluid
LT1 electric fans
MPG AVG == 17.46
=Dave