Best deal: $16.64 per gallon (35.0% below the median) — Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 Quarts
Price range: $16.64 – $280.32 per gallon across 64 offers. Median sits at $25.60.
Top brands showing: Castrol Edge, Castrol Gtx, Mobil Extended.
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