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Costco Oil Price Jumps Nearly 100%!
14 Sep
Summary
- Costco's Kirkland Signature full-synthetic motor oil price nearly doubled.
- Supply limits of two units per customer per week are now in effect.
- Refineries prioritize fuel production, impacting motor oil availability.

The cost of motor oil is experiencing unprecedented inflation, significantly impacting even budget-friendly retailers like Costco. Crude oil's current trading price of approximately $100 per barrel has forced a near doubling of prices for Costco's Kirkland Signature full-synthetic motor oil. A 10-quart supply, previously around $30, now costs $57.99.
In response to these escalating costs and market dynamics, Costco has also instituted a purchase limit, restricting customers to two units per week. This measure aims to ensure broader availability amidst supply chain pressures. The primary driver behind this price hike is the refinery industry's decision to prioritize producing gasoline and diesel fuel over motor oil.
Refineries can achieve higher profit margins by processing crude oil into transportation fuels compared to motor oil. Furthermore, the increasing sophistication of motor oil chemistries, necessitated by demands from smaller, high-performance engines, along with associated testing and licensing fees, contributes to the elevated production costs. These factors collectively explain the substantial increase in motor oil prices.