Representative Jim Sensenbrenner (R., Wis.) has a post on the Hill’s Congress Blog highlighting a bizarre new regulation from the EPA requiring some gas stations to sell at least four gallons of gasoline at a time. It affects those that pump both E10 and E15 (gas with 10 percent or 15 percent ethanol) through the same hose. Since E15 is pretty terrible for small engines and old cars (Sensenbrenner says it’s “like metal in a microwave for a small engine”), the theory is that when customers whose engines cannot handle it are buying gas,