Global Shortage Has Led to Motor Oil Rationing at Costco

Recorded: Sept. 13, 2026, 8 p.m.

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Global Shortage Has Led To Motor Oil Rationing At Costco

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Home » Auto News
Global Shortage Has Led To Motor Oil Rationing At Costco
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Image Credit: Tim Mossholder/Unsplash

Author: Andre Nalin
Updated: September 12, 2026
September 12, 2026

Changing your own oil has traditionally been one of the easiest ways to save money on car maintenance. For Costco members, Kirkland Signature synthetic oil has made the DIY approach particularly attractive thanks to its relatively low price.
That bargain has suddenly become much less compelling. According to The Auto Wire, a 10-quart case of Kirkland Signature full-synthetic motor oil is now listed at $57.99, up from prices that hovered in the mid-$30 range for years.
The price increase isn’t the only unusual development. Costco has also introduced purchase limits, restricting members to two units every seven days, meaning customers can buy a maximum of 20 quarts during that period.
Motor oil isn’t typically something shoppers expect to see rationed, which makes the restriction noteworthy. The Auto Wire points to tightening lubricant supply alongside the increasingly expensive and complicated process of producing oil that meets modern engine requirements.
Motor Oil Isn’t As Simple As It Used To Be
Image Credit: Shutterstock.
Today’s lubricants have to cope with turbochargers, direct injection, and increasingly demanding engines while meeting tougher industry specifications. Kirkland’s 5W-30 synthetic, for example, carries General Motors’ dexos1 Gen 3 approval.
Oils carrying that designation must satisfy GM’s testing requirements and licensing program. Modern API and ILSAC standards also require additional testing, including protection against low-speed pre-ignition, which can be particularly problematic for turbocharged direct-injection engines.
That means the oil sitting on Costco shelves is a considerably more sophisticated product than its basic plastic container might suggest. Developing, testing, and certifying those formulations adds costs before the product even reaches retailers.
Supply Is Tightening, Too
The Auto Wire also points to pressure further upstream in the petroleum industry. Base oil used to produce lubricants comes from the same refining system responsible for gasoline and diesel, leaving refiners to balance production according to market conditions.
When transportation fuels offer stronger returns, lubricant base-stock supply can face additional pressure. Those costs eventually work their way through manufacturers and distributors before reaching consumers.
Costco isn’t limiting only its Kirkland product, either. The Drive reports that Mobil 1 purchases are also restricted, although its limit is considerably higher at five units per member.
DIY Oil Changes Are Getting Pricier
Image Credit: Shutterstock.
The biggest consequence will be felt by drivers who service their own cars. Once a Kirkland 10-quart pack costs nearly $58, adding a quality filter can narrow the price advantage DIY maintenance traditionally held over some independent shops.
The purchase limit is arguably the bigger warning sign. Seeing motor oil rationed at Costco is unusual, and combined with the sharp price increase, it shows just how much pressure the lubricant market is currently facing.

Author: Andre Nalin
Title: Writer

Andre has worked as a writer and editor for multiple car and motorcycle publications over the last decade, but he has reverted to freelancing these days. He has accumulated a ton of seat time during his ridiculous road trips in highly unsuitable vehicles, and he’s built magazine-featured cars. He prefers it when his bikes and cars are fast and loud, but if he had to pick one, he’d go with loud.

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The global shortage of motor oil has resulted in significant changes to the market dynamics, particularly impacting consumers who perform their own maintenance, as evidenced by restrictions and price increases observed at Costco. Previously, the relatively low cost of Kirkland Signature synthetic oil made the do-it-yourself method an attractive way to manage vehicle maintenance. This bargain has diminished significantly, with a single 10-quart case of the synthetic oil now listed at $57.99, substantially higher than the mid-range prices seen previously. Furthermore, Costco has implemented purchase limits, restricting members to a maximum of two units every seven days, thereby limiting purchases to 20 quarts during that period.

This rationing is noteworthy because motor oil is not typically a commodity subject to such limitations, pointing to the unique pressures facing the lubricant market. The scarcity is compounded by the increasingly complex and costly process of producing modern lubricants that meet stringent engine requirements. Today's oils must accommodate advanced engine technologies such as turbochargers and direct injection systems, while simultaneously adhering to tougher industry specifications, including modifications mandated by organizations like General Motors through programs such as dexos1 Gen 3 approval. These modern standards, along with requirements from API and ILSAC, necessitate additional testing for protection against low-speed pre-ignition, which escalates the cost involved in developing, testing, and certifying the formulations before they reach the retailer.

In addition to these manufacturing complexities, the supply chain itself is under pressure upstream in the petroleum industry. The base oil used to produce lubricants originates from the same refining systems that supply gasoline and diesel, meaning refiners must balance production amidst shifting market conditions. When transportation fuels experience stronger returns, this base-stock supply faces further constraints, and these increased costs are ultimately passed down through manufacturers and distributors to the end consumer. The pressure is not limited to Costco’s Kirkland brand; reports also indicate restrictions on other major brands, such as Mobil 1, with a less generous limit of five units per member.

The most direct consequence of this situation will affect drivers who engage in DIY oil changes. The sharp price increase for the base product, coupled with purchase limitations, erodes the traditional cost advantage that DIY maintenance offered over independent service shops, especially when factoring in the addition of quality filters. The rationing at large retailers serves as a strong indicator of the intense market pressure currently exerted upon the lubricant supply chain.