^ ejmelton is correct - I've been to both those stations. IIRC, the one on Touhy is pretty close to the I-294, and I've been turning east after filling up, then heading south to O'Hare.
When returning from the south (I-294 northbound) I usually stop at the O'
Hare Oasis, just prior to the exit for O'Hare/River Rd (this is the unattended $0.80 toll plaza the signs in the Hertz office warn you about).