A 10-quart case of the company’s full-synthetic motor oil used to cost around $30, with no limit on how much you could buy.

As refiners now make more money turning crude oil into petrol, motor oil could face a significant supply squeeze.

Costco is rationing its Kirkland Signature motor oil as the Iran war fuels a growing squeeze on energy supplies and prices.

Costco is rationing its Kirkland Signature motor oil as a global shortage of a key ingredient used in synthetic lubricants ...

The American retailer Costco appeared to have instituted unusually strict restrictions on motor oil purchases at some of its ...

A Kirkland Signature oil change has nearly doubled in price, but that's not the most concerning change to how Costco's ...

Reports have claimed that Costco has been forced to raise the price on its Kirkland Signature oil blends and will even be ...

Costco has raised the price of its Kirkland-brand motor oil and limited customers to two cases per week. A 10-quart case of Kirkland Signature full synthetic motor oil is now $58 on Costco’s website, ...