im getting about 18 but my avg is on base as well i have a 6mile trip daily but most of it is between 45-35mph and maybe 3-4lights to the house. I was getting very ****ty mileage with that damned dod and out the box tune from diablo but after i got hp tuners and turned off my dod and scaled my MAF freq for my 4' FWI and did a couple of other tweaks my mileage is great.