I live 10 mins from work, the slate 5.9 pulls 10 in town 14 highway. my mom averaged 16 with the white one. We pulled 22 mpg out of it loaded down driving back 12 hours from St Louis Missouri 2 years ago. Otherwise it pulls around 17 highway. I drove it all day yesterday, and this morn & noticed I wasn't burning as much fuel as the slate one does on the same trips.
'94 ZJ Limited 4.0, BB, 31's, the rust free California transplant.