qqp question1: How often do you fill up with gas? What's the best method/frequency economically? I often fill up the tank to halfway, but should I fill it to the top more frequently, maybe on a quarterly basis? question2: Here in town gas is $1.79 a gal. I took two 5 gal cans and filled them with gas. It cost exactly $20.00 to fill both up. Wouldn't that be $2.00 a gal?