I’m getting about 13.5. Worst I’ve seen is 11.7, best was 15.2. My rig has stock turbo(AR 82 Garrett t3 I believe), 4:10 gears, 4x4, zf5, 35x12.5 inch tires. Most of my driving is on the grades in the Sierras, so I don’t know how that compares to around town driving