According to Gasbuddy, around May 1st (Labor day in most countries) crude oil reached $113/barrel. A week later it was down 14% to around 97. See chart below. By mid August, a barrel of oil was trading around $79, a 30% drop since May. Not bad.
Gasoline prices however have not followed. On average, we were paying $3.97 per gallon in early May while $3.58 in mid August, for a drop of merely 10%.
Someone is making money