I just documented over on YouTube an 800-mile road trip that I just took with my LC250. This is the first longer trip we have done with the LC since putting on the 295/70R18 Nitto Recon Grapplers. These Tires are 116s, so decently light, and they are wrapped around some RRW RS7 monoforged wheels. This setup is only about 10 lbs more over stock. In the past when we did this road trip, we averaged about 21mpg there and back. This time it was closer to 18.5mpg. There were some weather factors, but for the most part, I am noticing we clearly have made an impact on the Land Cruiser's overall MPG performance. The vehicle still drives great though, with no issues with the powertrain and these larger tires at all.