Best deal: $2.99 per quart (40.1% below the median) — Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts
Price range: $2.99 – $46.80 per quart across 19 offers. Median sits at $4.99.
Top brands showing: Castrol Gtx, Mobil Extended, Pennzoil High.
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