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Motor Oil
Price per fluid ounce across bottle sizes.
The cheapest motor oil right now is Quaker State Full Synthetic 0W-20 Motor Oil, 5 Quart at $0.125 / fl oz — 10 product lines compared, ranked by real price per fl oz.
💲 Prices and availability verified Aug 11, 2026, not live-updated yet — accurate as of that date and subject to change. Check the retailer for the current price before buying.
Price
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10 of 10 product lines · sorted by best price per unit
Best value
Quaker State
Quaker State Full Synthetic 0W-20 Motor Oil, 5 Quart
$0.125 / fl oz
$20.00 total · 1 size
Valvoline
Valvoline High Mileage with MaxLife Technology SAE 5W-20 Synthetic Blend Motor Oil 5 QT
$0.144 / fl oz
$22.97 total · 1 size
Valvoline
Valvoline High Mileage with MaxLife Technology 10W-30 Synthetic Blend Motor Oil 5 Quart
$0.144 / fl oz
$22.97 total · 1 size
Valvoline
Valvoline High Mileage with MaxLife Technology SAE 10W-40 Synthetic Blend Motor Oil 5 QT
$0.144 / fl oz
$22.97 total · 1 size
Castrol
Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 Quarts
$0.154 / fl oz
$24.58 total · 1 size
Castrol
Castrol EDGE 0W-20 Advanced Full Synthetic Motor Oil, 5 Quarts
$0.172 / fl oz
$27.48 total · 1 size
Castrol
Castrol EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts
$0.176 / fl oz
$28.12 total · 1 size
Valvoline
Valvoline Advanced Full Synthetic SAE 0W-20 Motor Oil 5 QT
$0.200 / fl oz
$31.97 total · 1 size
Valvoline
Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil 5 QT
$0.200 / fl oz
$31.97 total · 1 size
Valvoline
Valvoline MaxLife High Mileage Full Synthetic 5W-20 Motor Oil 5 Quart
$0.200 / fl oz
$31.97 total · 1 size
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