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Old 04-02-2015, 11:43 AM   #1
Sean C
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Join Date: Dec 2013
Location: NE
Posts: 92
LS Swap MPGs_What're you getting?

Hey guys! Just wondering what other LS swapped trucks are getting for gas mileage? My 04 5.3 with around 300 awhp gets about 11 MPGs in the city and does worse on the interstate. I'd estimate interstate MPGs are around 9 at 80 mph (right at 2000 RPM) which is awful.

My truck has a 4L65E and the stock rear end, 3.07(?). Maybe that gear is too short for the overdrive gear?

Also, the truck in general is a brick as far as aerodynamics are concerned, any ideas on streamlining it a bit? Something in the engine bay/wheel wells maybe?

Thanks guys!
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