I'm getting 22 average with mine. It is not getting a lot of miles since the weather changed. I think if you run it at a steady speed, especially using cruise control, that you will do better. I'm just outside St Louis in Augusta, so ping me if you want to chat more.

With the SRT6, it's really tempting to goose it, so take that into consideration. Mine is bone stock and it still pins me to the seat under hard acceleration.

Lou Fusz Ford in Chesterfield has an SSB roadster with 20k miles for $21,988. It's worth taking a test drive to see if you want to go for performance or economy.

Joe