My opinion on which is better, Castrol engine oil or Shell engine oil, is as follows:

1, I think Castrol oil and Shell oil have their own advantages, which one is better depending on personal needs and preferences.

2. The advantage of Castrol engine oil is that it has good wear resistance and can calmly face all kinds of bad road conditions. Multi-valve turbocharged engine has better use effect.

3. The advantage of Shell engine oil lies in its proprietary base oil and natural gas conversion technology, which can clean up the carbon deposits in the engine during the use of vehicles. Shell engine oil also has the advantage of making the viscosity of engine oil more durable and stable.