Find a good source than you can figure out what to do with it. I take home about 30 gallons from my work every day that I work. Sometimes my wife bring home some also. I filter 30 gallons 4 or 5 days a week and the ready to go drum never has as much as I need to filter.

5 gallons a week is $20 worth of gas and not even worth the effort of collecting and filtering.

I drive 600 miles in a week easy and my wife drives 750 plus. Give or take some. Going out of your way is not such a hardship when the fuel costs 3 cents per gallon.