Priced as of May 12, 2026
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Last reviewed May 15, 2026
TL;DR API SQ + ILSAC GF-7A — the current 2025/2026 top certification tier — with GM dexos1 Gen 3, Ford, and Chrysler OEM approvals. The 20,000-mile drain interval on the label is optimistic; community UOA data on BITOG places real-world performance at 8,000–10,000 miles on a typical daily driver.
What it is and how it performs
Castrol EDGE 5W-30 is a full-synthetic motor oil built on highly refined petroleum base stocks (IP 346-certified). It is certified to API SQ and ILSAC GF-7A — the successor specifications to API SP and GF-6A, launched March 2025 — and carries GM dexos1 Gen 3, Ford WSS-M2C961-A1, and Chrysler MS-6395 approvals. The label claims a 20,000-mile drain interval; BITOG UOA threads consistently place the oil at 8,000–10,000 miles before oxidation markers climb on a typical daily driver — solid for a full synthetic, but the headline number is a manufacturer maximum, not a real-world median. The SDS available for this product was last revised in 2017; the current formula is certified to API SQ/GF-7A, which postdates the SDS.
Who should buy this — and who should skip it
Best for owners maintaining 2020–2026 model-year GM, Ford, or Chrysler vehicles that specify 5W-30 and require one of the named OEM approvals. Skip it if your engine calls for a different viscosity grade, or if you have a pre-2010 high-mileage engine where ZDDP loading above the API-mandated minimum matters — Castrol does not disclose ZDDP ppm.
Safety and environmental impact
The SDS classifies Castrol EDGE 5W-30 as not hazardous under GHS — no signal word and no H-codes at mixture level. The California Prop 65 warning ("WARNING: Cancer and Reproductive Harm") is associated with mineral oil mist, which IARC classifies as a Group 1 carcinogen based on occupational aerosol exposure during industrial machining — not pour-and-drain contact during a home oil change. SDS §8 specifies nitrile gloves for prolonged or repeated skin contact (most relevant at the hot-drain step). Used engine oil accumulates combustion byproducts during service; IARC notes that used mineral-based crankcase oils carry elevated carcinogen risk from these byproducts — avoid prolonged skin contact and wash thoroughly. Used oil goes to collection — not down the drain or on the ground — at most automotive retailers and municipal hazardous waste facilities.
Frequently asked questions
Does Castrol EDGE 5W-30 really protect to 20,000 miles?▾
The 20,000-mile claim is a manufacturer drain interval — not a guarantee for all driving conditions. Community UOA threads on Bob Is The Oil Guy (BITOG) consistently place Castrol EDGE 5W-30 at 8,000–10,000 miles for typical daily-driver use before TBN depletion begins to accelerate. Extended-drain claims hold better for highway-heavy, low-load driving; stop-and-go or towing use should use shorter intervals. Follow your OEM's specified interval, not the label maximum.
What does API SQ mean, and is it better than API SP?▾
API SQ is the successor to API SP, introduced in 2025 as the current top certification for gasoline passenger-car engines. It adds tighter requirements for low-speed pre-ignition (LSPI) protection in turbocharged GDI engines, enhanced deposit control, and compatibility with fuel-efficient low-viscosity grades. If your vehicle specifies API SP or older, an SQ-certified oil is backward-compatible.
Is Castrol EDGE approved for GM vehicles?▾
Yes. Castrol EDGE 5W-30 carries GM dexos1 Gen 3 approval (license # D355AZFJ082, visible on the bottle label). GM dexos1 Gen 3 is required for most 2020+ GM gasoline engines and is backward-compatible with vehicles that specified dexos1 or dexos1 Gen 2. Verify your owner's manual for the specific viscosity grade your engine requires.
Why does the bottle say Prop 65 Warning — is Castrol EDGE dangerous?▾
The Prop 65 warning on California bottles is 'WARNING: Cancer and Reproductive Harm.' For motor oil, this warning is associated with mineral oil mist, which IARC classifies as a Group 1 carcinogen based on occupational aerosol exposure in industrial machining environments — not pour-and-drain contact during a home oil change. The SDS classifies the fresh oil as not hazardous. Used engine oil accumulates combustion byproducts during service; avoid prolonged skin contact and wash thoroughly.
Can I use Castrol EDGE 5W-30 in a Ford or Chrysler vehicle?▾
Yes. Castrol EDGE 5W-30 is approved to Ford WSS-M2C961-A1 and Chrysler MS-6395 specifications, as stated on the bottle label. Always verify that your specific vehicle requires 5W-30 and not a different viscosity grade — using the OEM-specified viscosity matters more than brand selection in most modern engines.
From the manufacturer
Marketing copy from Castrol, via Amazon. Not editorial.
- •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
- •***Or one year, whichever comes first
- •Approved and Licensed Specifications: Exceeds API SQ/SP/SN PLUS/SN | ILSAC GF-7 | GM dexos1 Gen 3
- •Meets engine test requirements of Chrysler MS 6395 | Meets Ford WSS-M2C946-B1 | Meets Ford WSS-M2C961-A1
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- SAE J300 Viscosity Grade
- 5W-30
- Brand
- Castrol
- Liquid Volume
- 5 Quarts
- Package Information
- Jug
- Vehicle Service Type
- Car, Truck
- Container Type
- Jug
- Compatible with Vehicle Type
- Car, Truck
- Viscosity Level
- Medium to High
- Automotive Fit Type
- Universal Fit
- Brand Name
- Castrol
- Manufacturer Part Number
- 1598B1
- UPC
- 079191230848
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Good Product. Good value. Thanks
Good Product. Good value. Thanks