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When I went from stock front to about 1" lift and coil overs and front bumper, I started seeing 15s when I used to see 18s. Now it's 15s and sometimes 16s....... 16mph when I go over 70mph.

The big effect is the front bumper, it's not just the lift in my case, the air deflection on the front has changed.
 

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I’ve got science here, kind of. Currently on a road trip to Northern CA.

Lifted 2.5 inches, 33’s, hardcore front bumper, winch, maxterra rear standard bumper.

Filled up in Las Vegas and ran some errands before taking off.

Note: adding 3.7% = roughly accounting for my bigger tires over stock.

Stretch 1:
Las Vegas to Kramer Junction CA
199.5 miles on trip odo
206.9 correction factor (add 3.7%)
12.345 gallons to full
16.75mpg

Stretch 2:
Kramer Junction to Bravo Farms Vintage Cheese Factory
Traver, CA
370.9 on trip odo
171.4 miles since last fill up
177.8 correction factor (add 3.7%)
9.79 gallons pumped
18.16 mpg

Stretch 3:
Made it to Sacramento, drove around, hit the wedding and gassed up before leaving in the morning
608.1 on trip odo
237.2 miles since last fill up
245.976 correction factor (add 3.7%)
15.073 gallons pumped
16.31mpg

Drove up to and around the Tahoe area today. I’ll update when we fill up tomorrow where we’re at.

I drove a Jeep Commander on 31’s that gave me 8-9 around town and 13 at best highway, the X is pretty great.
 

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Tires will have a much larger effect (and is exaggerated by driving style and gearing) than lift. Front bumper probably more than both of those.
Its hard to get a good number because we all vary so much.

'09, 4x4, 285s, 2in lift, Auto, 3.13 gears, stock bumpers, some armor but not excessive.
I get JUST UNDER 18mpg if I'm cruising at 80mph.
Short work commutes that are stop and go, its upper 13s to 15mpg max.

So anyone who is anywhere in between may just be a driving style difference.
 

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As discussed above, it depends.
When I lifted by front wilth coil overs just about an inch, but left the rear stock, my mpg was in the 15's. Now with a rear lift of 1" from the leaf springs, it's ack to the normal 17's and 18's.
And front bumper and tires (plies/weight and tread), roof rack and wind effect things.

How much would a 2.5 suspension lift effect gas mileage?
 

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Well then...
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405 Posts
Tires will have a much larger effect (and is exaggerated by driving style and gearing) than lift. Front bumper probably more than both of those.
Its hard to get a good number because we all vary so much.

'09, 4x4, 285s, 2in lift, Auto, 3.13 gears, stock bumpers, some armor but not excessive.
I get JUST UNDER 18mpg if I'm cruising at 80mph.
Short work commutes that are stop and go, its upper 13s to 15mpg max.

So anyone who is anywhere in between may just be a driving style difference.
Where we live also matters. Winter screws mpgs for some and for me the 110+ days suck up all the Prius abilities.


Sent from my iPhone using Tapatalk
 
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