Good to know, I'm at 7K miles and also about 18mpg. Increased fuel efficiency would be a bonus for switching tires! I assume 285/70/17 like Rubicons?I have a 2019 Moab with 4500 miles. Getting 20-21 mpg now. Was getting 18 for the first 2-3 k miles. I swapped the mud tires for BFG KO2s. Much quieter and smoother ride. Loving it.
Not a DD. Almost 6 month of ownership and about 1650 miles on it. Had KM2 for the first 500 miles and then KO2 the rest. Computer not updated to reflect slightly larger tires (33 vs 32 inch). 80% of miles in rural roads between 30 and 45mph and the rest on highway between 65 and 70 mph. I drive with a light foot on gas and brake. So far averaging 21.1 mpg. I do notice warmer weather brings about 0.5 to 1 mpg higher.
I notice the better ride quality but not the acceleration as I didn't accelerate hard at all. Also I notice very little in fuel consumption after switching the tires. For me the most fuel savings came from the rise in temperature. Also, I believe KO2 is heavier than KM2.Did you notice any change when you switched tires? Mainly, did it feel any more peppy?