+83°
🛢️Motor oil & fluids
Valvoline MaxLife High Mileage 5W-30 Synthetic Blend Motor Oil…
$4.59Cost / quart
Price checked Jul 21 · confirm on Amazonpack price$22.97
Valvoline · Amazon
See on Amazon Valvoline vs Castrol
Which is cheaper per quart? Ranked from real, continuously tracked Amazon US prices — not sticker prices.
Castrol wins on cost per quart
As of July 2026, Castrol is cheaper per quart: about $5.19/quart at the median vs $6.39/quart for Valvoline — across 7 Castrol and 12 Valvoline deals we track. Prices re-checked continuously.
| Per quart | Valvoline | Castrol |
|---|---|---|
| Median | $6.39 | $5.19 |
| Cheapest | $4.59 | $4.79 |
| Products tracked | 12 | 7 |
See all of each brand ranked by cost per quart: Valvoline, Castrol · or the best motor oil & fluids of 2026.
Cheapest Valvoline per quart
+76°
🛢️Motor oil & fluids
Valvoline High Mileage with MaxLife Technology 10W-30…
$4.59Cost / quart
Price checked Jul 21 · confirm on Amazonpack price$22.97
Valvoline · Amazon
See on Amazon +66°
🛢️Motor oil & fluids
Valvoline European Vehicle Full Synthetic SAE 5W-40 Motor Oil…
$5.39Cost / quart
Price checked Jul 21 · confirm on Amazonpack price$26.97
Valvoline · Amazon
See on Amazon +119°
🛢️Motor oil & fluids
Valvoline MaxLife High Mileage Full Synthetic 5W-20 Motor Oil…
$6.39Cost / quart
Price checked Jul 21 · confirm on Amazon🔥 Popularpack price$31.97
Valvoline · Amazon
See on Amazon Cheapest Castrol per quart
+77°
🛢️Motor oil & fluids
Castrol EDGE High Mileage 0W-20 Advanced Full Synthetic Motor…
$4.79Cost / quart
Price checked Jul 21 · confirm on Amazonpack price$23.97
subscribe & save$4.55−5%
Castrol · Amazon
See on Amazon +128°
🛢️Motor oil & fluids
Castrol EDGE Extended Performance 0W-20 Advanced Full…
$5.19Cost / quart
Price checked Jul 21 · confirm on Amazon🔥 Popularpack price$25.97$29.48↓12%
subscribe & save$4.93−5%
Castrol · Amazon
See on Amazon +120°
🛢️Motor oil & fluids
Castrol Edge Extended Performance 5W-20 Advanced Full…
$5.19Cost / quart
Price checked Jul 21 · confirm on Amazon🔥 Popularpack price$25.97$29.48↓12%
subscribe & save$4.93−5%
Castrol · Amazon
See on Amazon +68°
🛢️Motor oil & fluids
Castrol Edge Extended Performance 0W-20 Advanced Full…
$5.19Cost / quart
Price checked Jul 21 · confirm on Amazonpack price$77.91
Castrol · Amazon
See on Amazon