Costco raises Kirkland motor oil price to $57.99 and caps purchases at two units per week amid global lubricant shortage

Costco has raised the price of its Kirkland Signature full-synthetic motor oil 5-quart two pack to roughly $58, up from approximately $30 just a year ago, and is now limiting members to two boxes per week. The moves come as a global lubricant shortage, linked to the ongoing Middle East conflict and tightening crude oil supply, pushes benchmark prices toward $100 a barrel.

The restrictions extend beyond the store-brand product. Costco is also capping purchases of Mobil 1 full-synthetic motor oil 1-quart six packs, priced at around $44, at five units per membership. The rationing is aimed at deterring hoarding and managing supply stress across warehouse shelves.

The broader supply picture is stark. The International Energy Agency cut its 2026 global oil supply forecast to 102 million barrels per day in August, projecting a deficit of 1.8 million barrels per day in the third quarter, more than double its prior estimate. Costco did not immediately reply to a request for comment on the pricing and purchase limit changes.