What will my mpg be if I modify a LC 250 to have the ground clearance of my lifted 2014 4Runner?

[geomars]

My 4Runner is a 2014 Limited (full-time 4wd) with 2-3" Sonoran Steel lift. The clearance to the rear differential is 10". Tires are 265/70R18. Combined mpg is 19.7.

My recollection is that someone on this forum reported that the LC clearance is limited to 8.7" by the front skid plate, and that the clearance at the differential is 9.25". This means that increasing the tire diameter by 1.5" will increase clearance at the differential by the 0.75" needed to match my 4 Runner. The LC would need a front lift of ~0.5" - 0.8" added to the 0.5"-0.75" from the larger tires to increase clearance at the front skid to equal the 10" of my 4Runner.
The question for readers of this forum is what mpg can I expect on a LC 250 if tire diameter is increased to ~33.5" to 34", and the vehicle is lifted by 1-2"?

All of this is to help me decide whether to upgrade to a LC250, or to a 2025 4Runner TRD PRO, or stick with my 2014 4Runner (that has all my weekend DIY work to install the lift, hidden winch, and build drawers).

On a related issue, does anyone know how the stock LC shocks compare to the TRD PRO Fox QS3 (on pavement, off road, washboard roads)?

Thanks.

 

[RideWithYanu]

The weight of the tire will have a much larger impact on fuel efficiency than the diameter will.

 

[D-mac]

If clearance is your main priority, then the 4Runner is going to be the better choice, because you can get about 10" straight from the factory. MPGs should be about the same as your current 4Runner within a mpg or two.

 

[jenos96]

If you have money to burn you can replace the wheels with something lightweight. The OEM wheels are pretty heavy.

 

[APIOQM]

If you were getting 2 MPG over EPA in the 4Runner (impressive given the modifications), you can expect similar from the 250, so around 25 MPG. Remember, the 250 takes 91 octane, which will negate some of the improvement.

It's not all that clear to me how there would be a difference in ground clearance between the new 4Runner and 250, since they share the same frame and suspension.