I buy as-needed from FCP Euro and my 3x Euro cars' oil changes are 100% free 100% of the time. Why have inventory? The other 2 vehicles get Wally ST so again no reason to have stock. 5x vehicles and ~45 qts/yr. I get prices have risen so that ST at Wally could have been bought ahead of need but tine value of money probably still says better to buy as-needed.