I hope this is the right section. Kum and Go is a gas station popular in the midwest. I think they extend beyond Iowa. In any case, I found this one from twitter--looks like you'll find some if you follow @Kumandgo. No I don't work for them--just found awesome deals hehe!

Kum & Go

plus they have a page with monthly deals. Free coke this month + gas coupon.

Kum & Go Monthly Coupons

I blogged about this too but the info's all here on this deal. :)

Yay for free beverages. Hope this helps!