This is an abundance of reading but it's full of information.
https://en.wikipedia.org/wiki/World_oil_market_chronology_from_2003
The highest recorded price per barrel maximum of $147.02 was reached on July 11, 2008.[8] After falling below $100 in the late summer of 2008, prices rose again in late September. On September 22, oil rose over $25 to $130 before settling again to $120.92, marking a record one-day gain of $16.37. Electronic crude oil trading was temporarily halted by NYMEX when the daily price rise limit of $10 was reached, but the limit was reset seconds later and trading resumed.[9] By October 16, prices had fallen again to below $70, and on November 6 oil closed below $60.[10] Then in 2009, prices went slightly higher, although not to the extent of the 20052007 crisis, exceeding $100 in 2011 and most of 2012. Since late 2013 the oil price has fallen below the $100 mark, plummeting below the $50 mark one year later.
As the price of producing petroleum did not rise significantly, the price increases have coincided with a period of record profits for the oil industry.[citation needed] Between 2004 and 2007, the profits of the six supermajors ExxonMobil, Total, Shell, BP, Chevron, and ConocoPhillips totaled $494.8 billion.[11] Likewise, major oil-dependent countries such as Saudi Arabia, the United Arab Emirates, Canada, Russia, Venezuela and Nigeria have benefited economically from surging oil prices during the 2000s.
We know that when the price of oil goes up, a long list of every day goods go up. The price of oil can go down but grocery and other goods prices never return to the original price. Prepare for all consumer goods to increase, not just groceries.