$3.19 for me. Though since I belong to a fuel rewards program through my local grocery store, I often pay much less than the going rate.
I get 10 cents of PER GALLON, for every $50 I spend there. Not just groceries either, but gift cards for MANY different retailors. TRU included. On average I save 40 cents per gallon due to food purchases and gift cards. On an 18 gallon tank, that's an average of $7.20. So 2 1/3 gallons free basically.
Last August in preperation for Halo 3 I bought the limited edition Halo XBox360. I got it from Best Buy, but first stopped at my grocery store to get $500 in gift cards. It just so happened the gift cards were DOUBLE fuel points to boot, so that saved me $2.00 per gallon right there. I already had 70 cents off per gallon. So, at $2.70 off per gallon and gas being $2.76 at the time, I ended up only paying $1.00 TOTAL for a full tank of gas! (I even took a picture for proof.)
It's an excellent fuel program for consumers and yet somehow the grocery store makes money from it.