Thumb Score: +17

Amazon [amazon.com] has 5-Quart Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil on sale for $14.95 – 5% off when you checkout via Subscribe & Save = $14.20. Shipping is free w/ Prime or on orders $35+.

This sale price matches the April 2026 Frontpage deal which received + 56 votes from the community.