SpinkillerAI — AI-Powered Fact-Checker

Find the Quote. Expose the Spin. SpinkillerAI is an AI-powered fact-checking platform for investigating public figures and verifying statements against primary sources.

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Fact-check: “Costco Hikes Motor Oil Prices”

Verdict: True (92% confidence)

Multiple independent news outlets — including AP, CNBC, The Hill, and USA Today — reported on September 14, 2026 that Costco's Kirkland Signature full-synthetic motor oil 5-quart two-pack rose to approximately $57.99, up from roughly $30 the prior year, nearly doubling the price. Costco's own product pages also showed the $57.99 price and imposed purchase limits of two units per week per member. No contrary evidence was found disputing that the price increase occurred.

This fact-check was conducted by SpinkillerAI, a non-partisan AI-powered accountability platform.

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