Castrol GTX C4 5W-30 Fully Synthetic Engine Oil 1L

Castrol GTX C4 5W-30 Fully Synthetic Engine Oil 1L is a fully synthetic 5W-30 engine oil from Castrol, supplied in a 1L pack. It meets ACEA C4 and carries manufacturer approvals including MB 226.51, MB 229.51, Renault RN 0720.

Castrol GTX is one of the world's best-known engine oils, with a double-action formula that cleans away existing sludge and helps stop new deposits forming.

Specifications at a glance

Suitable for

Use where the vehicle manufacturer calls for MB 226.51; MB 229.51; Renault RN 0720; Fiat 9.55535-S4; MB 229.31. Commonly used in Mercedes-Benz, Renault, Dacia and Nissan, Fiat, Alfa Romeo and Jeep vehicles. Always confirm the grade against your owner's handbook or service schedule before use, as requirements vary between engines of the same model.

Key benefits

• Fully synthetic base oil keeps its viscosity stable from cold starts to sustained high temperatures.
• ACEA C4: a very low-SAPS specification for diesel engines with particulate filters, mainly Renault and Mercedes-Benz.

Frequently asked questions

Is Castrol GTX C4 5W-30 right for my car?

Look in your handbook or on the oil filler cap for the specification codes listed above, such as MB 226.51. If your vehicle lists one of them, this oil meets the requirement. If you are unsure, send us your registration number and we will confirm the correct grade.

What does 5W-30 mean?

The first number (5W) describes how easily the oil flows when cold, so a lower number means easier cold starts. The second number describes the oil's thickness at normal running temperature. Always use the grade your manufacturer specifies.

How much oil will I need?

Most petrol and diesel cars take between 4 and 6 litres for a full oil change, so a 1L pack is ideal for top-ups between services. Check your handbook for the exact capacity including the filter.

Supplied sealed in the manufacturer's original packaging and dispatched from the UK by Nitroma Lubricants.