+77°
🛢️Motor oil & fluids
Castrol EDGE High Mileage 0W-20 Advanced Full Synthetic Motor…
$4.79Cost / quart
Price checked Jul 22 · confirm on Amazonpack price$23.97
subscribe & save$4.55−5%
Castrol · Amazon
See on Amazon Castrol vs Mobil
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 $7.19/quart for Mobil — across 7 Castrol and 8 Mobil deals we track. Prices re-checked continuously.
| Per quart | Castrol | Mobil |
|---|---|---|
| Median | $5.19 | $7.19 |
| Cheapest | $4.79 | $6.39 |
| Products tracked | 7 | 8 |
See all of each brand ranked by cost per quart: Castrol, Mobil · or the best motor oil & fluids of 2026.
Cheapest Castrol per quart
+169°
🛢️Motor oil & fluids
Castrol Edge Extended Performance 5W-20 Advanced Full…
$5.19Cost / quart
Price checked Jul 22 · confirm on Amazon🔥 Popularpack price$25.97$29.48↓12%
subscribe & save$4.93−5%
Castrol · Amazon
See on Amazon +128°
🛢️Motor oil & fluids
Castrol EDGE Extended Performance 0W-20 Advanced Full…
$5.19Cost / quart
Price checked Jul 22 · 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 22 · confirm on Amazonpack price$77.91
Castrol · Amazon
See on Amazon Cheapest Mobil per quart
+192°
🛢️Motor oil & fluids
Mobil 1 Truck & SUV Full Synthetic Motor Oil 0W-20
$6.39Cost / quart
Price checked Jul 22 · confirm on Amazon🔥 Popularpack price$63.94
Mobil · Amazon
See on Amazon +75°
🛢️Motor oil & fluids
Mobil 1 High Mileage Full Synthetic Motor Oil 0W-20, 5 Quart
$6.39Cost / quart
Price checked Jul 22 · confirm on Amazonpack price$31.97
Mobil · Amazon
See on Amazon +71°
🛢️Motor oil & fluids
Mobil 1 Advanced Fuel Economy Full Synthetic Motor Oil 0W-20
$6.39Cost / quart
Price checked Jul 22 · confirm on Amazonpack price$31.97
Mobil · Amazon
See on Amazon +68°
🛢️Motor oil & fluids
Mobil 1 High Mileage Full Synthetic Motor Oil 5W-30, 5 Quart
$6.39Cost / quart
Price checked Jul 22 · confirm on Amazonpack price$31.97
Mobil · Amazon
See on Amazon