Automotive Car Fluids & Chemicals Motor Oils

10 Best Motor Oils 5W-30 of September 2026

TOP PICKS

Bestseller No. 1

Castrol EDGE 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts

Castrol EDGE 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts

3X Stronger than the leading full synthetic*
10X Better high stress performance**
20,000 miles between oil changes***
Viscosity breakdown as measured in Kurt Orbahn test on 5W-30 grade
As measured in Seq IX test under high load/torque conditions vs. API SQ test limits

Bestseller No. 2

Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 Quarts

Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 Quarts

Phosphorus Replacement Technology helps extend emission system life
Superior dispersancy that fights sludge build up
Exceptional oil burn-off protection exceeding industry standards* | Seal conditioners to help reduce leaks
Advanced additives that help prevent engine wear | Improved Fuel Economy**
Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets Ford WSS-M2C946-B1 | Meets Ford WSS-M2C961-A1 | * Based on API and ACEA volatility specifications | ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

Bestseller No. 3

Castrol EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts

Castrol EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts

Phosphorus Replacement Technology to help extend the life of the emission system
Reduces leaks, oil burnoff and power robbing deposits
15,000 miles between oil changes*
Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets engine test requirements of Chrysler MS 6395 | Meets Ford WSS-M2C946-B1 | Meets Ford WSS-M2C961-A3
Or one year, whichever comes first

SaleBestseller No. 4 −10%

Castrol GTX Full Synthetic 5W-30 Motor Oil, 5 Quarts

Castrol GTX Full Synthetic 5W-30 Motor Oil, 5 Quarts

6X better wear protection on critical engine parts than industry standards**
1.3X better sludge protection than industry standards*
3X Stronger against viscosity breakdown than leading full synthetic^
Protection for 10,000 miles between oil changes
As measured in Sequence VH sludge test vs. API SP limits

Bestseller No. 5

Castrol EDGE Extended Performance 5W-30 Advanced Full Syn Motor Oil, 5 Qt

Castrol EDGE Extended Performance 5W-30 Advanced Full Syn Motor Oil, 5 Qt

PACKAGING MAY VARY - 20,000 mile/25,000 mile warranty

Bestseller No. 6

Edge High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 1 Quart (Pack of 1)

Edge High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 1 Quart (Pack of 1)

Phosphorus Replacement Technology to help extend the life of the emission system
Reduces leaks, oil burnoff and power robbing deposits
15,000 miles between oil changes*
Or one year, whichever comes first
Meets or exceeds the following specifications:

SaleBestseller No. 7 −16%

Castrol GTX 5W-30 Synthetic Blend Motor Oil, 5 Quarts

Castrol GTX 5W-30 Synthetic Blend Motor Oil, 5 Quarts

1.4X superior sludge protection compared to tough industry standards, as measured in the Sequence VH Sludge test vs. API SP test limits
Advanced protection against viscosity and thermal breakdown
Superior protection against high-temperature deposits
Premium-quality base oils and anti-wear additives that help extend the life of your engine

Bestseller No. 8

Castrol GTX Full Synthetic 5W-30 Motor Oil, 5 Quarts, Pack of 3

Castrol GTX Full Synthetic 5W-30 Motor Oil, 5 Quarts, Pack of 3

6X better wear protection on critical engine parts than industry standards**
1.3X better sludge protection than industry standards*
3X Stronger against viscosity breakdown than leading full synthetic^
Protection for 10,000 miles between oil changes
As measured in Sequence VH sludge test vs. API SP limits

Bestseller No. 9

Castrol EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 6 Quarts EcoPack

Castrol EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 6 Quarts EcoPack

Phosphorus Replacement Technology to help extend the life of the emission system
Reduces leaks, oil burnoff and power robbing deposits
15,000 miles between oil changes*
Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets engine test requirements of Chrysler MS 6395 | Meets Ford WSS-M2C946-B1 | Meets Ford WSS-M2C961-A3
Or one year, whichever comes first

Bestseller No. 10

Castrol Edge Euro 5W-30 K Motor Oil, 5 Quart, Pack of 3

Castrol Edge Euro 5W-30 K Motor Oil, 5 Quart, Pack of 3

3X Better wear protection to reduce friction and optimize performance* 1.9X Better engine cleanliness to help maximize engine performance* *As measured in OM646LA test vs. test limit
Approved and licensed specifications: ACEA C3 API SP BMW Longlife-04 MB-Approval 229.31/ 229.51/ 229.52 VW 504 00 / 507 00 Porsche C30 Renault RN 0700 / RN 0710
Suitable for use in the following specifications: VW 505 00 / 505 01