Amazon has 5-qt Castrol GTX Full Synthetic Motor Oil (5W-20) on sale for $21.08 - $1.05 (5% Subscribe & Save discount) = $20.03. Shipping is free with Prime or on $35+ orders.

Amazon has 5-qt Castrol GTX Full Synthetic Motor Oil (0W-20) on sale for $23.96 - $1.20 (5% Subscribe & Save discount) = $22.76. Shipping is free with Prime or on $35+ orders.

Thanks to community member ArseneWenger for finding this deal.

Features:

• 6X better wear protection on critical engine parts than industry standards
• 1.3X better sludge protection than industry standards
• 3X Stronger against viscosity breakdown than leading full synthetic
• Protection for 10,000 miles between oil changes