Impressive gas mileage!

[sport05]

I'm averaging around 13.1 with 275x70x17s, Spidertrax 1.25" wheel spacers, Toytec Boss, and Yakima Load Warrior rack. It hurts to do the math

 

[jacobbert9]

Before my lift, I would get 22-24 on the highway at 70 mph going from Tulsa to Stillwater, OK. With the 285-75/16's and lift I get about 20 mpg at 65-70mph on the same stretch of road. Around town though, I only get 15 or 16 mpg. Overall, I can't complain with how much it's lifted.

And yes, I do correct for the different tire size when I calculate.

BTW, in my experience, adding roof racks makes the biggest difference. When my 4Runner was all stock, I added a roof rack and my mileage instantly dropped. I thought it might be another issue (spark pugs, MAF etc) until I pulled it off on the side of the highway one day and watched the mileage on my Scangauge go from 16.5 to 22 mpg while doing 70 mph.

 

[Bstrom]

I'm pretty sure octane is at work here too. I get right at 19mpg with my '03 Tundra but at least 5mpg less with the '99 4Runner using Regular gas. Tried Midgrade but didn't see much of a diff...

 

[Jimstr8]

I wish the 4runner had a bigger overdrive gear. It could definitely take another gear to improve gas mileage.