We have a BP credit card and we get 5% back on all gas purchases. I'm pretty sure that everyone knows that by now since I post non-stop about how I use that money to fund our free Christmas(hopefully).
BP also gives you $.10 to $.20 off a gallon if you purchase a car wash. The car wash is $5 for the cheapest one. If I purchase 10 gallons, I get $2 off and the car wash only costs me $3. It's a great car wash and the $3 is well spent in my opinion. It takes me hours to wash the van even with the kids
Here is the evil
There isn't much you can do to save money on gas other than air up your tires and take the junk out of your trunk. But this one really will save some money when you fill up.
Now to coordinate a time so we can all fill up!
I have gas,