Home Slickdeals Costco Members: 4-Pk 5-Qt Kirkland Signature Full Synthetic Motor Oil (various) $64... Slickdeals Costco Members: 4-Pk 5-Qt Kirkland Signature Full Synthetic Motor Oil (various) $64 each + Free Shipping By ARCOM - 1 September 2024 18 0 SHARE Facebook Twitter Go to the deal page: Costco Members: 4-Pk 5-Qt Kirkland Signature Full Synthetic Motor Oil (various) $64 each + Free Shipping