Quick Summary
Castrol GTX 10W 40 A3/B4 Engine Oil 5L is a motor oil for vehicles that need this grade and specification set. It is listed as suitable for API SP and includes approvals and meets statements for Fiat, Mercedes Benz, Renault, and VW use.
Who It Is Best For
This is best for drivers looking for a 10W 40 engine oil with the stated A3/B4 specification and the listed approval references. It suits shoppers who want to match oil requirements carefully and prefer a single 5L container.
What To Know Before You Buy
Check your vehicle handbook or the current oil requirement before ordering, especially if you need a specific approval or specification.
Pros: Clear grade and specification details make it easier to match to the right vehicle requirement.
Cons: You should confirm the exact approval or specification needed for your vehicle before buying.
Common Buyer Questions
What type of product is this?
It is Castrol GTX 10W 40 A3/B4 engine oil in a 5L size.
Is it suitable for my vehicle?
It may be suitable if your vehicle calls for the listed grade, specification, or approval references. Check your handbook first.
What approvals or meets statements are listed?
It is listed as suitable for API SP and meets Fiat 9.55535 D2 and 9.55535 G2, with MB Approval 226.5 and 229.3, Renault RN 0700 and RN 0710, and VW 501 01 and 505 00.
What does 5L mean?
It refers to the container size.
Should I check anything before ordering?
Yes, make sure the grade and specification match what your vehicle needs.
Key Details
| Detail | What it means in use |
|---|---|
| Brand | Castrol |
| Product type | Engine oil |
| Grade | 10W 40 |
| Specification | ACEA A3/B4 |
| Container size | 5L |
| Listed suitability | Suitable for API SP |
| Meets | Fiat 9.55535 D2 and 9.55535 G2 |
| Approvals | MB Approval 226.5 and 229.3 |
| Additional meets statements | Renault RN 0700 and RN 0710, VW 501 01 and 505 00 |
Final Buying View
Castrol GTX 10W 40 A3/B4 Engine Oil 5L is a straightforward choice if you need this exact grade and the listed specification references. It gives you a clear set of compatibility markers to check against your vehicle needs. If the grade and approvals match, it is a sensible option to consider.





