Cheapest motor oil per Gallons

Best deal: $13.93 per gallon (63.7% below the median) — Delo 400 XLE Heavy Duty Synblend Diesel Engine Oil 15W-40, 1 Gallon...

Price range: $13.93 – $97.78 per gallon across 14 offers. Median sits at $38.38.

Top brands showing: Liqui Moly, Shell Rotella, Delo Xle.

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