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George H.
George H., Technician
Category: Classic Car
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Experience:  Old enough to have worked on them when they were new
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Can I use normal dot4 fluid in rolls royce silver shadow

Customer Question

Hi
Can I use normal dot4 fluid in rolls royce silver shadow brake hydraulic system?
Submitted: 1 year ago.
Category: Classic Car
Expert:  George H. replied 1 year ago.

Hello I will help you with your question,

The factory fill is Castrol 363 which is a DOT 3 spec fluid with a lubricant added. The DOT 4 is the same fluid with a higher boiling point so they are compatible.

You should not use any product marked synthetic, they will not mix with the conventional fluids.

If this were my vehicle I would use the Castrol 363, if you wish you can install DOT 4.

Please let me know if you have further questions

Thank you

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