+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 5W-20 vs 5W-30
Which is cheaper per quart? Ranked from real, continuously tracked Amazon US prices — not sticker prices.
Too close to call
As of July 2026, 5W-20 and 5W-30 run neck-and-neck at about $6.39/quart — price is not the tiebreaker here, so pick on what the job actually needs, not on cost per quart.
| Per quart | 5W-20 | 5W-30 |
|---|---|---|
| Median | $6.39 | $6.39 |
| Cheapest | $5.19 | $4.59 |
| Products tracked | 3 | 7 |
See all of each brand ranked by cost per quart: 5W-20, 5W-30 · or the best motor oil & fluids of 2026.
Cheapest 5W-20 per quart
+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 +66°
🛢️Motor oil & fluids
Castrol GTX Full Synthetic High Mileage 5W-20 Motor Oil
$6.60Cost / quart
Price checked Jul 21 · confirm on Amazonpack price$32.99
subscribe & save$6.27−5%
Castrol · Amazon
See on Amazon Cheapest 5W-30 per quart
+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 +74°
🛢️Motor oil & fluids
Pennzoil Platinum Full Synthetic 5W-30 Motor Oil, 5 Quart
$5.88Cost / quart
Price checked Jul 19 · confirm on Amazonpack price$29.38
Pennzoil · Amazon
See on Amazon +71°
🛢️Motor oil & fluids
Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil 5 QT
$6.39Cost / quart
Price checked Jul 21 · confirm on Amazonpack price$31.97
Valvoline · Amazon
See on Amazon +66°
🛢️Motor oil & fluids
Mobil 1 High Mileage Full Synthetic Motor Oil 5W-30, 5 Quart
$6.39Cost / quart
Price checked Jul 21 · confirm on Amazonpack price$31.97
Mobil · Amazon
See on Amazon