On May 1, average prices for gasoline and diesel fell by 13 cents per liter, while the energy tax was reduced by approximately 17 cents. The ADAC has accused oil companies of not fully passing on the tax savings, a sentiment echoed by the Munich-based Ifo Institute, which reported incomplete pass-throughs at gas stations. Diesel prices saw an average reduction of only 4 cents per liter, and super gasoline by 12 cents. Cartel Office President Mundt indicated that various factors influence pricing and that his office is actively collecting and analyzing data on compliance with pricing regulations, including adherence to the 12 PM price adjustment rule.