I have used a little expense book made by "At-a-glance", that is tailored for automobiles. It is only about 4 by 6 inches and fits nicely in the glovebox. I find it easier to record the mileage of all my gas receipts if I have the book in the car.
It has different column headings depending on what tab you have turned to. There are sections for Gasoline, Lube, Tires, Repairs and Maintenance. It is about $8 at the Office Max near me.