Not to step on the general point you are making, but a barrel of oil is 42 gallons[0], so $0.83&#x2F;gal. Also, I get spring water from a ~local spring for $0.85&#x2F;gal.<p>[0]<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Barrel_%28unit%29#Oil_barrel" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Barrel_%28unit%29#Oil_barrel</a>