QCIA says they are technically not an FBO, but they run the self service gas off K3, and have a pilot lounge that was open. Ask to taxi to the self service pumps. There is a parking area outside Gate 28 if you need picked up. You will need to call the airport fire department at (309) 757-1739 to get remotely let out of the fence. They will take down your name and then you call them to get let back in when you need to depart. No problems getting in and out even though I returned after dark.

Terrible service! I stopped on my way to OSH and fuel was not working. No NOTAM's. Called service guy, he stated he was occupied to assist. Had to go FBO and spend $2.00 more per gallon. Avoid this airport

When flying in make certain to ask for "South Ts" or "self service" if seeking the self service fuel. GA tie downs are beside fuel pumps. Fuel pumps are east side of the hangars. After taxiing off the movement area, follow the yellow line and make a left following signs for fuel pumps.